87639568 has 20 divisors (see below), whose sum is σ = 177185088. Its totient is φ = 41914400.

The previous prime is 87639557. The next prime is 87639583. The reversal of 87639568 is 86593678.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118708 + ... + 119443.

Almost surely, 2^87639568 is an apocalyptic number.

It is an amenable number.

87639568 is an abundant number, since it is smaller than the sum of its proper divisors (89545520).

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

87639568 is a wasteful number, since it uses less digits than its factorization.

87639568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238182 (or 238176 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The square root of 87639568 is about 9361.6007178260. The cubic root of 87639568 is about 444.1879192632.

The spelling of 87639568 in words is "eighty-seven million, six hundred thirty-nine thousand, five hundred sixty-eight".