87807136 has 24 divisors (see below), whose sum is σ = 174140820. Its totient is φ = 43580928.

The previous prime is 87807127. The next prime is 87807143. The reversal of 87807136 is 63170878.

It can be written as a sum of positive squares in 2 ways, for example, as 87235600 + 571536 = 9340^2 + 756^2 .

It is a super-4 number, since 4×87807136⁴ (a number of 33 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5631 + ... + 14398.

Almost surely, 2^87807136 is an apocalyptic number.

It is an amenable number.

87807136 is a deficient number, since it is larger than the sum of its proper divisors (86333684).

87807136 is a wasteful number, since it uses less digits than its factorization.

87807136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20176 (or 20168 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 87807136 is about 9370.5461953933. The cubic root of 87807136 is about 444.4708367290.

The spelling of 87807136 in words is "eighty-seven million, eight hundred seven thousand, one hundred thirty-six".