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10,400

10,400 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 Harshad / Niven

Properties

Parity
Even
Digit count
5
Digit sum
5
Digital root
5
Palindrome
No
Divisor count
36
σ(n) — sum of divisors
27,342

Primality

Prime factorization: 2 5 × 5 2 × 13

Divisors & multiples

All divisors (36)
1 · 2 · 4 · 5 · 8 · 10 · 13 · 16 · 20 · 25 · 26 · 32 · 40 · 50 · 52 · 65 · 80 · 100 · 104 · 130 · 160 · 200 · 208 · 260 · 325 · 400 · 416 · 520 · 650 · 800 · 1040 · 1300 · 2080 · 2600 · 5200 · 10400
Aliquot sum (sum of proper divisors): 16,942
Factor pairs (a × b = 10,400)
1 × 10400
2 × 5200
4 × 2600
5 × 2080
8 × 1300
10 × 1040
13 × 800
16 × 650
20 × 520
25 × 416
26 × 400
32 × 325
40 × 260
50 × 208
52 × 200
65 × 160
80 × 130
100 × 104
First multiples
10,400 · 20,800 · 31,200 · 41,600 · 52,000 · 62,400 · 72,800 · 83,200 · 93,600 · 104,000

Representations

In words
ten thousand four hundred
Ordinal
10400th
Binary
10100010100000
Octal
24240
Hexadecimal
28A0

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 10400, here are decompositions:

  • 31 + 10369 = 10400
  • 43 + 10357 = 10400
  • 67 + 10333 = 10400
  • 79 + 10321 = 10400
  • 97 + 10303 = 10400
  • 127 + 10273 = 10400
  • 157 + 10243 = 10400
  • 223 + 10177 = 10400

Showing the first eight; more decompositions exist.

Unicode codepoint
⢠
U+28A0
Other symbol (So)

UTF-8 encoding: E2 A2 A0 (3 bytes).

Lookup U+28A0 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#0028A0
RGB(0, 40, 160)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.40.160.