1650
1650 is the year Ussher's biblical chronology dated creation to 4004 BC.
- Even
- Composite
Why 1650 is special
He worked from genealogies and reign lengths with real scholarly care. The date was printed in Bible margins for centuries and taken as authoritative long after geology contradicted it.
Factors & digit properties
- Divisors (24)
- 1, 2, 3, 5, 6, 10, 11, 15, 22, 25, 30, 33, 50, 55, 66, 75, 110, 150, 165, 275, 330, 550, 825, 1650
- Prime factorisation
- 2 × 3 × 5^2 × 11
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 1650
- Binary
- 11001110010
- Octal
- 3162
- Hexadecimal
- 672
- Roman numeral
- MDCL
- Scientific notation
- 1.650 × 10^3
Other mathematical patterns
- Abundant number
Religion & belief
Ussher calculated a creation date of 4004 BC using genealogies and cross-referenced regnal dates. The scholarship was serious and the premises were not testable, which is why the figure persisted in printed Bibles for two centuries.
DocumentedReligion & beliefGeography: IrelandPeriod: 1650
Common questions
Is 1650 a prime number?
No, 1650 is not prime.
What are the factors of 1650?
The factors of 1650 are 1, 2, 3, 5, 6, 10, 11, 15, 22, 25, 30, 33, 50, 55, 66, 75, 110, 150, 165, 275, 330, 550, 825, 1650.
What is 1650 in Roman numerals?
1650 in Roman numerals is MDCL.
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