Live analysis

9,990

9,990 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 Flippable Harshad / Niven

Properties

Parity: Even
Digit count: 4
Digit sum: 27
Digital root: 9
Palindrome: No
Reversed: 999
Flips to (rotate 180°): 666
Divisor count: 32
σ(n) — sum of divisors: 27,360

Primality

Prime factorization: 2 × 3 ³ × 5 × 37

Divisors & multiples

All divisors (32)

1 · 2 · 3 · 5 · 6 · 9 · 10 · 15 · 18 · 27 · 30 · 37 · 45 · 54 · 74 · 90 · 111 · 135 · 185 · 222 · 270 · 333 · 370 · 555 · 666 · 999 · 1110 · 1665 · 1998 · 3330 · 4995 · 9990

Aliquot sum (sum of proper divisors): 17,370

Factor pairs (a × b = 9,990)

1 × 9990

2 × 4995

3 × 3330

5 × 1998

6 × 1665

9 × 1110

10 × 999

15 × 666

18 × 555

27 × 370

30 × 333

37 × 270

45 × 222

54 × 185

74 × 135

90 × 111

First multiples

9,990 · 19,980 · 29,970 · 39,960 · 49,950 · 59,940 · 69,930 · 79,920 · 89,910 · 99,900

Representations

In words: nine thousand nine hundred ninety
Ordinal: 9990th
Binary: 10011100000110
Octal: 23406
Hexadecimal: 0x2706
Base64: JwY=

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 9990, here are decompositions:

17 + 9973 = 9990
23 + 9967 = 9990
41 + 9949 = 9990
59 + 9931 = 9990
61 + 9929 = 9990
67 + 9923 = 9990
83 + 9907 = 9990
89 + 9901 = 9990

Showing the first eight; more decompositions exist.

Unicode codepoint

✆

Telephone Location Sign

U+2706

Other symbol (So)

UTF-8 encoding: E2 9C 86 (3 bytes).

Lookup U+2706 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#002706

RGB(0, 39, 6)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.39.6.

Address: 0.0.39.6
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.39.6

Unspecified address (0.0.0.0/8) — "this network" placeholder.