1638
1638 is the year Galileo published his work on motion and materials.
- Even
- Composite
Where 1638 fits
Why 1638 is special
Written under house arrest and smuggled out for printing in the Netherlands, it contains the physics that outlasted the astronomy he was convicted over.
Factors & digit properties
- Divisors (24)
- 1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 39, 42, 63, 78, 91, 117, 126, 182, 234, 273, 546, 819, 1638
- Prime factorisation
- 2 × 3^2 × 7 × 13
- Digit sum
- 18
- Digital root
- 9
Representations
- Decimal
- 1638
- Binary
- 11001100110
- Octal
- 3146
- Hexadecimal
- 666
- Roman numeral
- MDCXXXVIII
- Scientific notation
- 1.638 × 10^3
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
Galileo was tried in 1633 and wrote Two New Sciences under house arrest, published abroad in 1638. The physics outlasted the astronomy he was convicted over.
View 1633 →Other connections
- developed from1633
why?
Strength 0.50, confidence "high".
Science
Galileo's Two New Sciences was composed while confined and printed abroad because publication in Italy was barred. It is the work that founded the study of motion, and it exists because the ban was evaded.
DocumentedScienceGeography: Italy and NetherlandsPeriod: 1638
Common questions
Is 1638 a prime number?
No, 1638 is not prime.
What are the factors of 1638?
The factors of 1638 are 1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 39, 42, 63, 78, 91, 117, 126, 182, 234, 273, 546, 819, 1638.
What is 1638 in Roman numerals?
1638 in Roman numerals is MDCXXXVIII.
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