87643632 has 40 divisors (see below), whose sum is σ = 231683584. Its totient is φ = 28534464.

The previous prime is 87643613. The next prime is 87643643. The reversal of 87643632 is 23634678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19168 + ... + 23295.

Almost surely, 2^87643632 is an apocalyptic number.

It is an amenable number.

87643632 is an abundant number, since it is smaller than the sum of its proper divisors (144039952).

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

87643632 is a wasteful number, since it uses less digits than its factorization.

87643632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42517 (or 42511 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 87643632 is about 9361.8177722064. The cubic root of 87643632 is about 444.1947850805.

The spelling of 87643632 in words is "eighty-seven million, six hundred forty-three thousand, six hundred thirty-two".