1628
1628 is the year Harvey published his account of blood circulation.
- Even
- Composite
Where 1628 fits
Why 1628 is special
He showed the heart pumps the same blood around a closed loop, replacing the belief that blood was continuously made and consumed. His practice suffered because the finding was so widely disbelieved.
1628 is part of
Factors & digit properties
- Divisors (12)
- 1, 2, 4, 11, 22, 37, 44, 74, 148, 407, 814, 1628
- Prime factorisation
- 2^2 × 11 × 37
- Digit sum
- 17
- Digital root
- 8
Representations
- Decimal
- 1628
- Scientific notation
- 1.628 × 10^3
Roman numerals
M D C X X V I I I
Binary
1 1 0 0 1 0 1 1 1 0 0
1 × 1,024 + 1 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 1,628
Octal
3 1 3 4
3 × 512 + 1 × 64 + 3 × 8 + 4 × 1 = 1,628
Hexadecimal
6 5 c
6 × 256 + 5 × 16 + c × 1 = 1,628
Read as powers of two: 1,024 + 512 + 64 + 16 + 8 + 4 = 1,628.
In historical numeral systems
Egyptian
1 lotus, 6 coils of rope, 2 hobbles, 8 strokes
1 × 1,000 + 6 × 100 + 2 × 10 + 8 × 1 = 1,628. 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), 8 vertical wedges (units place)
27 × 60 + 8 = 1628. 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
- Deficient number
Related numbers & connections
1628 is a year in the 17th century, in the 1620s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Science
In 1628, William Harvey published his account of the circulation of the blood (England).
DocumentedScienceGeography: EnglandPeriod: 1628Harvey demonstrated circulation by measuring how much blood the heart moves — far more than the body could manufacture. The conclusion was rejected widely enough to damage his medical practice before it was accepted.
DocumentedSciencePeriod: 1628
Common questions
Is 1628 a prime number?
No, 1628 is not prime.
What are the factors of 1628?
The factors of 1628 are 1, 2, 4, 11, 22, 37, 44, 74, 148, 407, 814, 1628.
What is 1628 in Roman numerals?
1628 in Roman numerals is MDCXXVIII.
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