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.
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
- Binary
- 11001011000
- Octal
- 3130
- Hexadecimal
- 658
- Roman numeral
- MDCXXIV
- Scientific notation
- 1.624 × 10^3
Other mathematical patterns
- Abundant number
Related numbers & connections
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 →Other connections
- is associated with1716
why?
Strength 0.50, confidence "high".
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.
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