1628
1628 is the year Harvey published his account of blood circulation.
- Even
- Composite
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.
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
- Binary
- 11001011100
- Octal
- 3134
- Hexadecimal
- 65c
- Roman numeral
- MDCXXVIII
- Scientific notation
- 1.628 × 10^3
Other mathematical patterns
- Deficient number
Science
Harvey 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: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026