Number
438
438 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 15
- Digital root
- 6
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 888
Primality
Prime factorization: 2 × 3 × 73
Divisors & multiples
Aliquot sum (sum of proper divisors):
450
Representations
- In words
- four hundred thirty-eight
- Ordinal
- 438th
- Roman numeral
- CDXXXVIII
- Binary
- 110110110
- Octal
- 666
- Hexadecimal
- 1B6
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 438, here are decompositions:
- 5 + 433 = 438
- 7 + 431 = 438
- 17 + 421 = 438
- 19 + 419 = 438
- 29 + 409 = 438
- 37 + 401 = 438
- 41 + 397 = 438
- 59 + 379 = 438
Showing the first eight; more decompositions exist.
Unicode codepoint
ƶ
U+01B6
Lowercase letter (Ll)
UTF-8 encoding: C6 B6 (2 bytes).
Hex color
#0001B6
RGB(0, 1, 182)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.182.