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8,820

8,820 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
4
Digit sum
18
Digital root
9
Palindrome
No
Divisor count
54
σ(n) — sum of divisors
31,122

Primality

Prime factorization: 2 2 × 3 2 × 5 × 7 2

Divisors & multiples

All divisors (54)
1 · 2 · 3 · 4 · 5 · 6 · 7 · 9 · 10 · 12 · 14 · 15 · 18 · 20 · 21 · 28 · 30 · 35 · 36 · 42 · 45 · 49 · 60 · 63 · 70 · 84 · 90 · 98 · 105 · 126 · 140 · 147 · 180 · 196 · 210 · 245 · 252 · 294 · 315 · 420 · 441 · 490 · 588 · 630 · 735 · 882 · 980 · 1260 · 1470 · 1764 · 2205 · 2940 · 4410 · 8820
Aliquot sum (sum of proper divisors): 22,302
Factor pairs (a × b = 8,820)
1 × 8820
2 × 4410
3 × 2940
4 × 2205
5 × 1764
6 × 1470
7 × 1260
9 × 980
10 × 882
12 × 735
14 × 630
15 × 588
18 × 490
20 × 441
21 × 420
28 × 315
30 × 294
35 × 252
36 × 245
42 × 210
45 × 196
49 × 180
60 × 147
63 × 140
70 × 126
84 × 105
90 × 98
First multiples
8,820 · 17,640 · 26,460 · 35,280 · 44,100 · 52,920 · 61,740 · 70,560 · 79,380 · 88,200

Representations

In words
eight thousand eight hundred twenty
Ordinal
8820th
Binary
10001001110100
Octal
21164
Hexadecimal
2274

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 8820, here are decompositions:

  • 13 + 8807 = 8820
  • 17 + 8803 = 8820
  • 37 + 8783 = 8820
  • 41 + 8779 = 8820
  • 59 + 8761 = 8820
  • 67 + 8753 = 8820
  • 73 + 8747 = 8820
  • 79 + 8741 = 8820

Showing the first eight; more decompositions exist.

Unicode codepoint
≴
U+2274
Math symbol (Sm)

UTF-8 encoding: E2 89 B4 (3 bytes).

Lookup U+2274 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#002274
RGB(0, 34, 116)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.34.116.