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42,408

42,408 is a composite number, even.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).
Abundant Number Happy Number Harshad / Niven

Properties

Parity
Even
Digit count
5
Digit sum
18
Digital root
9
Palindrome
No
Divisor count
48
σ(n) — sum of divisors
124,800

Primality

Prime factorization: 2 3 × 3 2 × 19 × 31

Divisors & multiples

All divisors (48)
1 · 2 · 3 · 4 · 6 · 8 · 9 · 12 · 18 · 19 · 24 · 31 · 36 · 38 · 57 · 62 · 72 · 76 · 93 · 114 · 124 · 152 · 171 · 186 · 228 · 248 · 279 · 342 · 372 · 456 · 558 · 589 · 684 · 744 · 1116 · 1178 · 1368 · 1767 · 2232 · 2356 · 3534 · 4712 · 5301 · 7068 · 10602 · 14136 · 21204 · 42408
Aliquot sum (sum of proper divisors): 82,392
Factor pairs (a × b = 42,408)
1 × 42408
2 × 21204
3 × 14136
4 × 10602
6 × 7068
8 × 5301
9 × 4712
12 × 3534
18 × 2356
19 × 2232
24 × 1767
31 × 1368
36 × 1178
38 × 1116
57 × 744
62 × 684
72 × 589
76 × 558
93 × 456
114 × 372
124 × 342
152 × 279
171 × 248
186 × 228
First multiples
42,408 · 84,816 · 127,224 · 169,632 · 212,040 · 254,448 · 296,856 · 339,264 · 381,672 · 424,080

Representations

In words
forty-two thousand four hundred eight
Ordinal
42408th
Binary
1010010110101000
Octal
122650
Hexadecimal
A5A8

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42408, here are decompositions:

  • 5 + 42403 = 42408
  • 11 + 42397 = 42408
  • 17 + 42391 = 42408
  • 29 + 42379 = 42408
  • 59 + 42349 = 42408
  • 71 + 42337 = 42408
  • 101 + 42307 = 42408
  • 109 + 42299 = 42408

Showing the first eight; more decompositions exist.

Unicode codepoint
U+A5A8
Other letter (Lo)

UTF-8 encoding: EA 96 A8 (3 bytes).

Hex color
#00A5A8
RGB(0, 165, 168)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.165.168.

Possible US bank routing number

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

Routing number
000042408
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.