Live analysis

8,440

8,440 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

Properties

Parity: Even
Digit count: 4
Digit sum: 16
Digital root: 7
Palindrome: No
Divisor count: 16
σ(n) — sum of divisors: 19,080

Primality

Prime factorization: 2 ³ × 5 × 211

Divisors & multiples

All divisors (16)

1 · 2 · 4 · 5 · 8 · 10 · 20 · 40 · 211 · 422 · 844 · 1055 · 1688 · 2110 · 4220 · 8440

Aliquot sum (sum of proper divisors): 10,640

Factor pairs (a × b = 8,440)

1 × 8440

2 × 4220

4 × 2110

5 × 1688

8 × 1055

10 × 844

20 × 422

40 × 211

First multiples

8,440 · 16,880 · 25,320 · 33,760 · 42,200 · 50,640 · 59,080 · 67,520 · 75,960 · 84,400

Representations

In words: eight thousand four hundred forty
Ordinal: 8440th
Binary: 10000011111000
Octal: 20370
Hexadecimal: 20F8

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 8440, here are decompositions:

11 + 8429 = 8440
17 + 8423 = 8440
53 + 8387 = 8440
71 + 8369 = 8440
149 + 8291 = 8440
167 + 8273 = 8440
197 + 8243 = 8440
269 + 8171 = 8440

Showing the first eight; more decompositions exist.

Hex color

#0020F8

RGB(0, 32, 248)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.32.248.