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131852808 = 23321831289
BaseRepresentation
bin1111101101111…
…10101000001000
3100012002211001100
413312332220020
5232223242213
621030021400
73160505343
oct766765010
9305084040
10131852808
1168477a6a
12381a7860
1321416c19
141372345a
15b897773
hex7dbea08

131852808 has 24 divisors (see below), whose sum is σ = 357101550. Its totient is φ = 43950912.

The previous prime is 131852803. The next prime is 131852849. The reversal of 131852808 is 808258131.

It can be written as a sum of positive squares in only one way, i.e., 126292644 + 5560164 = 11238^2 + 2358^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (131852803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 915573 + ... + 915716.

Almost surely, 2131852808 is an apocalyptic number.

131852808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

131852808 is an abundant number, since it is smaller than the sum of its proper divisors (225248742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131852808 is a wasteful number, since it uses less digits than its factorization.

131852808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831301 (or 1831294 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 131852808 is about 11482.7177967587. The cubic root of 131852808 is about 508.9750117358.

The spelling of 131852808 in words is "one hundred thirty-one million, eight hundred fifty-two thousand, eight hundred eight".

Divisors: 1 2 3 4 6 8 9 12 18 24 36 72 1831289 3662578 5493867 7325156 10987734 14650312 16481601 21975468 32963202 43950936 65926404 131852808