1,440
1440 is the number of minutes in a day — 24 hours of 60 minutes each.
- Even
- Composite
Where 1,440 fits
Why 1,440 is special
1440 is what the day looks like once you stop counting in hours, and it inherits its awkwardness honestly: 24 and 60 are both inherited conventions, so their product is not a round decimal number. It is unusually divisible for its size — 36 divisors — which is why a day splits evenly into halves, thirds, quarters, fifths, sixths, eighths and tenths when measured in minutes. It has a second, unrelated modern life as the vertical pixel count of 1440p displays.
Same number, different meanings
How 1,440 is understood across different contexts — never implying one meaning because of another.
- Mathematics
1440 is what the day looks like once you stop counting in hours, and it inherits its awkwardness honestly: 24 and 60 are both inherited conventions, so their product is not a round decimal number. It is unusually divisible for its size — 36 divisors — which is why a day splits evenly into halves, thirds, quarters, fifths, sixths, eighths and tenths when measured in minutes. It has a second, unrelated modern life as the vertical pixel count of 1440p displays.
- Technology & computing
In 1440, Gutenberg was developing printing with movable metal type at Strasbourg (Germany).
- Everyday life
There are 1440 minutes in a day, following from 24 hours of 60 minutes each. Both multipliers are inherited conventions rather than natural units, so the total is exact but not round in decimal.
Not just a mathematical number
1,440is also used in ways where ordinary arithmetic doesn't apply — each listed below with what genuinely does and doesn't follow from it.
- Mathematical number
A genuine quantity — its mathematical properties (prime, square, factors, and so on) are real facts about it.
A genuine quantity that ordinary arithmetic applies to — it can be prime, even, a perfect square, added to another number meaningfully, and so on.
- Measurement
Also used as a measurement — Minutes and seconds.
A quantity expressed against a defined unit or standard (24 hours in a day, 60 seconds in a minute) — arithmetic is meaningful, but the specific value is a fixed convention of the measuring system, not a discovered mathematical property.
1,440 is part of
Factors & digit properties
- Divisors (36)
- 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 120, 144, 160, 180, 240, 288, 360, 480, 720, 1440
- Prime factorisation
- 2^5 × 3^2 × 5
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 1440
- Scientific notation
- 1.440 × 10^3
Roman numerals
M C D X L
MCDXL uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 0 1 1 0 1 0 0 0 0 0
1 × 1,024 + 0 × 512 + 1 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 1,440
Octal
2 6 4 0
2 × 512 + 6 × 64 + 4 × 8 + 0 × 1 = 1,440
Hexadecimal
5 a 0
5 × 256 + a × 16 + 0 × 1 = 1,440
Read as powers of two: 1,024 + 256 + 128 + 32 = 1,440.
In historical numeral systems
Egyptian
1 lotus, 4 coils of rope, 4 hobbles
1 × 1,000 + 4 × 100 + 4 × 10 = 1,440. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 4 vertical wedges (sixties place), empty units place
24 × 60 + 0 = 1440. Places are separated by a space on the tablet, with the higher place written first. The second place is empty, and this is precisely the case the early system could not write unambiguously — the same wedges alone would also read as 1.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
1440 is 24 × 60 — the day in minutes, built from the minutes-per-hour factor.
View 60 →1440 is a year in the 15th century, in the 1440s.
1440 is the day counted in minutes, the unit this concept defines.
Mathematically related
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- is associated withMinutes and seconds
why?
Strength 0.50, confidence "high".
- is associated withHours in a day
why?
Strength 0.50, confidence "high".
- is associated withTime unit conversions
why?
Strength 0.50, confidence "high".
Technology & computing
In 1440, Gutenberg was developing printing with movable metal type at Strasbourg (Germany).
DocumentedTechnology & computingGeography: GermanyPeriod: 14401440p refers to a display resolution of 2560 × 1440 pixels, named — like 1080p and 720p — for its vertical pixel count rather than its horizontal one.
DocumentedTechnology & computing
Everyday life
There are 1440 minutes in a day, following from 24 hours of 60 minutes each. Both multipliers are inherited conventions rather than natural units, so the total is exact but not round in decimal.
DocumentedEveryday life
Mathematics
1440 factors as 2⁵ × 3² × 5 and has 36 divisors. That unusually high count for its size is why a day measured in minutes divides evenly into halves, thirds, quarters, fifths, sixths, eighths, tenths and twelfths.
DocumentedMathematics
Common questions
Is 1,440 a prime number?
No, 1,440 is not prime.
What are the factors of 1,440?
The factors of 1,440 are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 120, 144, 160, 180, 240, 288, 360, 480, 720, 1440.
What is 1,440 in Roman numerals?
1,440 in Roman numerals is MCDXL. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be MCCCCXXXX, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 4 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026