180

180 = 2 × 2 × 3 × 3 × 5

180 = 1 + 2 + 34 + 56 + 78 + 9

180 = 98 + 7 + 65 + 4 + 3 + 2 + 1

180 = −0^0 + 1^7 + 2^8 − 3^9 + 4^5 + 5^6 + 6^2 + 7^4 + 8^3 + 9^1

180 = 6^2 + 12^2

180 divides 19^2 - 1.

180³ = 6³ + 7³ + 8³ + ...+ 68³ + 69³

180 = (11 + 1 + 1)⁽¹⁺¹⁾ + 11

a(n) = n*(n+8), n = 10

a(n) = n*(n+3), n = 12

Numbers k such that k^4 + 1 is prime.

Factors: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180

One hundred eighty

Representations, Binary to Hexadecimal:

10110100_2
20200_3
2310_4
1210_5
500_6
345_7
264_8
220_9
154_11
130_12
10b_13
cc_14
c0_15
b4_16

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