number.wiki

Number

404

404 is a composite number, even, a calendar year.

Deficient Number Happy Number Palindrome Year

Properties

Parity: Even
Digit count: 3
Digit sum: 8
Digital root: 8
Palindrome: Yes
Divisor count: 6
σ(n) — sum of divisors: 714

Primality

Prime factorization: 2 ² × 101

Divisors & multiples

All divisors (6)

1 · 2 · 4 · 101 · 202 · 404

Aliquot sum (sum of proper divisors): 310

Factor pairs (a × b = 404)

1 × 404

2 × 202

4 × 101

First multiples

404 · 808 · 1,212 · 1,616 · 2,020 · 2,424 · 2,828 · 3,232 · 3,636 · 4,040

Representations

In words: four hundred four
Ordinal: 404th
Roman numeral: CDIV
Binary: 110010100
Octal: 624
Hexadecimal: 194

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 404, here are decompositions:

3 + 401 = 404
7 + 397 = 404
31 + 373 = 404
37 + 367 = 404
67 + 337 = 404
73 + 331 = 404
97 + 307 = 404
127 + 277 = 404

Showing the first eight; more decompositions exist.

Unicode codepoint

Ɣ

U+0194

Uppercase letter (Lu)

UTF-8 encoding: C6 94 (2 bytes).

Lookup U+0194 on Compart ↗ Lookup on FileFormat.Info ↗

HTTP status code

HTTP 404 Not Found — The requested resource could not be found.

4xx class: Client Error.

Hex color

#000194

RGB(0, 1, 148)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.148.