87638936 has 32 divisors (see below), whose sum is σ = 204871680. Its totient is φ = 34144800.

The previous prime is 87638911. The next prime is 87638981. The reversal of 87638936 is 63983678.

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, 70520 + ... + 71751.

It is an arithmetic number, because the mean of its divisors is an integer number (6402240).

Almost surely, 2^87638936 is an apocalyptic number.

It is an amenable number.

87638936 is an abundant number, since it is smaller than the sum of its proper divisors (117232744).

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

87638936 is a wasteful number, since it uses less digits than its factorization.

87638936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142295 (or 142291 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 87638936 is about 9361.5669628540. The cubic root of 87638936 is about 444.1868515284.

The spelling of 87638936 in words is "eighty-seven million, six hundred thirty-eight thousand, nine hundred thirty-six".