Number
418
418 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 13
- Digital root
- 4
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 720
Primality
Prime factorization: 2 × 11 × 19
Divisors & multiples
Aliquot sum (sum of proper divisors):
302
Representations
- In words
- four hundred eighteen
- Ordinal
- 418th
- Roman numeral
- CDXVIII
- Binary
- 110100010
- Octal
- 642
- Hexadecimal
- 1A2
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 418, here are decompositions:
- 17 + 401 = 418
- 29 + 389 = 418
- 59 + 359 = 418
- 71 + 347 = 418
- 101 + 317 = 418
- 107 + 311 = 418
- 137 + 281 = 418
- 149 + 269 = 418
Showing the first eight; more decompositions exist.
Unicode codepoint
Ƣ
U+01A2
Uppercase letter (Lu)
UTF-8 encoding: C6 A2 (2 bytes).
HTTP status code
HTTP 418 I'm a teapot — RFC 2324 — short and stout. Returned by some servers as an Easter egg.
4xx class: Client Error.
Hex color
#0001A2
RGB(0, 1, 162)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.162.