Number

1,520

1,520 is a composite number, even, a calendar year.

Abundant Number Harshad / Niven Pentagonal Year

Properties

Parity: Even
Digit count: 4
Digit sum: 8
Digital root: 8
Palindrome: No
Divisor count: 20
σ(n) — sum of divisors: 3,720

Primality

Prime factorization: 2 ⁴ × 5 × 19

Divisors & multiples

All divisors (20)

1 · 2 · 4 · 5 · 8 · 10 · 16 · 19 · 20 · 38 · 40 · 76 · 80 · 95 · 152 · 190 · 304 · 380 · 760 · 1520

Aliquot sum (sum of proper divisors): 2,200

Factor pairs (a × b = 1,520)

1 × 1520

2 × 760

4 × 380

5 × 304

8 × 190

10 × 152

16 × 95

19 × 80

20 × 76

38 × 40

First multiples

1,520 · 3,040 · 4,560 · 6,080 · 7,600 · 9,120 · 10,640 · 12,160 · 13,680 · 15,200

Representations

In words: one thousand five hundred twenty
Ordinal: 1520th
Roman numeral: MDXX
Binary: 10111110000
Octal: 2760
Hexadecimal: 5F0

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1520, here are decompositions:

31 + 1489 = 1520
37 + 1483 = 1520
61 + 1459 = 1520
67 + 1453 = 1520
73 + 1447 = 1520
97 + 1423 = 1520
139 + 1381 = 1520
193 + 1327 = 1520

Showing the first eight; more decompositions exist.

Unicode codepoint

U+05F0

Other letter (Lo)

UTF-8 encoding: D7 B0 (2 bytes).

Lookup U+05F0 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0005F0

RGB(0, 5, 240)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.240.

Possible US bank routing number

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

Routing number

000001520

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.

Look up 000001520 on FedACH ↗ Routing Number Lookup (Wise) ↗