3629
RFC 3629 defines UTF-8 as the standard encoding of Unicode.
- Odd
- Composite
Where 3629 fits
Why 3629 is special
Its key property is that ASCII text is already valid UTF-8, so half the world's existing files needed no conversion at all.
3629 is part of
Factors & digit properties
- Divisors (4)
- 1, 19, 191, 3629
- Prime factorisation
- 19 × 191
- Digit sum
- 20
- Digital root
- 2
Representations
- Decimal
- 3629
- Scientific notation
- 3.629 × 10^3
Roman numerals
M M M D C X X I X
MMMDCXXIX uses the subtractive pair IX: one before ten — ten minus one.
Binary
1 1 1 0 0 0 1 0 1 1 0 1
1 × 2,048 + 1 × 1,024 + 1 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 3,629
Octal
7 0 5 5
7 × 512 + 0 × 64 + 5 × 8 + 5 × 1 = 3,629
Hexadecimal
e 2 d
e × 256 + 2 × 16 + d × 1 = 3,629
Read as powers of two: 2,048 + 1,024 + 512 + 32 + 8 + 4 + 1 = 3,629.
In historical numeral systems
Egyptian
3 lotuses, 6 coils of rope, 2 hobbles, 9 strokes
3 × 1,000 + 6 × 100 + 2 × 10 + 9 × 1 = 3,629. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
- Happy number
- Semiprime
Related numbers & connections
UTF-8 was designed so existing ASCII text was already valid, which is why adoption needed no migration.
UTF-8 is self-describing where ISO 8859 is not, which is why a UTF-8 file cannot be mistaken for a different language's encoding.
View 8859 →Technology & computing
RFC 3629 restricts UTF-8 to the range covered by Unicode and forbids overlong forms. Bytes 0 to 127 encode identically to US-ASCII, which is why adoption required no migration of existing plain text.
DocumentedTechnology & computingGeography: International — IETFPeriod: 2003
Common questions
Is 3629 a prime number?
No, 3629 is not prime.
What are the factors of 3629?
The factors of 3629 are 1, 19, 191, 3629.
What is 3629 in Roman numerals?
3629 in Roman numerals is MMMDCXXIX. IX is subtractive: one before ten — ten minus one. Written additively it would be MMMDCXXVIIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
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: 15 July 2026