1624
1624 is the year the first submarine was demonstrated on the Thames.
- Even
- Composite
Where 1624 fits
Why 1624 is special
Cornelius Drebbel's oared vessel travelled submerged for hours, reportedly with James I aboard. How the crew breathed is not satisfactorily explained by any surviving account.
Same number, different meanings
How 1624 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Cornelius Drebbel's oared vessel travelled submerged for hours, reportedly with James I aboard. How the crew breathed is not satisfactorily explained by any surviving account.
- History
In 1624, the Dutch founded New Amsterdam on Manhattan Island (North America).
- Technology & computing
Drebbel's submersible reportedly stayed under for hours in 1624. No surviving account explains how air was maintained, and the claim that the king went aboard is not independently confirmed.
1624 is part of
Factors & digit properties
- Divisors (16)
- 1, 2, 4, 7, 8, 14, 28, 29, 56, 58, 116, 203, 232, 406, 812, 1624
- Prime factorisation
- 2^3 × 7 × 29
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 1624
- Scientific notation
- 1.624 × 10^3
Roman numerals
M D C X X I V
MDCXXIV uses the subtractive pair IV: one before five — five minus one.
Binary
1 1 0 0 1 0 1 1 0 0 0
1 × 1,024 + 1 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 0 × 1 = 1,624
Octal
3 1 3 0
3 × 512 + 1 × 64 + 3 × 8 + 0 × 1 = 1,624
Hexadecimal
6 5 8
6 × 256 + 5 × 16 + 8 × 1 = 1,624
Read as powers of two: 1,024 + 512 + 64 + 16 + 8 = 1,624.
In historical numeral systems
Egyptian
1 lotus, 6 coils of rope, 2 hobbles, 4 strokes
1 × 1,000 + 6 × 100 + 2 × 10 + 4 × 1 = 1,624. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 7 vertical wedges (sixties place), 4 vertical wedges (units place)
27 × 60 + 4 = 1624. Places are separated by a space on the tablet, with the higher place written first.
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
Related numbers & connections
1624 is a year in the 17th century, in the 1620s.
Drebbel demonstrated a submersible in 1624 and Halley a resupplied diving bell in 1716. Both faced the same unsolved problem of supplying air.
View 1716 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- is associated with1716
why?
Strength 0.50, confidence "high".
History
In 1624, the Dutch founded New Amsterdam on Manhattan Island (North America).
DocumentedHistoryGeography: North AmericaPeriod: 1624
Technology & computing
Drebbel's submersible reportedly stayed under for hours in 1624. No surviving account explains how air was maintained, and the claim that the king went aboard is not independently confirmed.
DocumentedTechnology & computingGeography: EnglandPeriod: 1624
Common questions
Is 1624 a prime number?
No, 1624 is not prime.
What are the factors of 1624?
The factors of 1624 are 1, 2, 4, 7, 8, 14, 28, 29, 56, 58, 116, 203, 232, 406, 812, 1624.
What is 1624 in Roman numerals?
1624 in Roman numerals is MDCXXIV. IV is subtractive: one before five — five minus one. Written additively it would be MDCXXIIII, 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: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026