Number

408

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

Abundant Number Harshad / Niven Octagonal Year

Properties

Parity: Even
Digit count: 3
Digit sum: 12
Digital root: 3
Palindrome: No
Divisor count: 16
σ(n) — sum of divisors: 1,080

Primality

Prime factorization: 2 ³ × 3 × 17

Divisors & multiples

All divisors (16)

1 · 2 · 3 · 4 · 6 · 8 · 12 · 17 · 24 · 34 · 51 · 68 · 102 · 136 · 204 · 408

Aliquot sum (sum of proper divisors): 672

Factor pairs (a × b = 408)

1 × 408

2 × 204

3 × 136

4 × 102

6 × 68

8 × 51

12 × 34

17 × 24

First multiples

408 · 816 · 1,224 · 1,632 · 2,040 · 2,448 · 2,856 · 3,264 · 3,672 · 4,080

Representations

In words: four hundred eight
Ordinal: 408th
Roman numeral: CDVIII
Binary: 110011000
Octal: 630
Hexadecimal: 198

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 408, here are decompositions:

7 + 401 = 408
11 + 397 = 408
19 + 389 = 408
29 + 379 = 408
41 + 367 = 408
59 + 349 = 408
61 + 347 = 408
71 + 337 = 408

Showing the first eight; more decompositions exist.

Unicode codepoint

U+0198

Uppercase letter (Lu)

UTF-8 encoding: C6 98 (2 bytes).

Lookup U+0198 on Compart ↗ Lookup on FileFormat.Info ↗

HTTP status code

HTTP 408 Request Timeout — Server timed out waiting for the request.

4xx class: Client Error.

Hex color

#000198

RGB(0, 1, 152)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.152.

Possible US bank routing number

This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.

Routing number

000000408

Federal Reserve

United States Government

Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.

Look up 000000408 on FedACH ↗ Routing Number Lookup (Wise) ↗