87621656 has 8 divisors (see below), whose sum is σ = 164290620. Its totient is φ = 43810824.

The previous prime is 87621649. The next prime is 87621683. The reversal of 87621656 is 65612678.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5476346 + ... + 5476361.

Almost surely, 2^87621656 is an apocalyptic number.

It is an amenable number.

87621656 is a deficient number, since it is larger than the sum of its proper divisors (76668964).

87621656 is a wasteful number, since it uses less digits than its factorization.

87621656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952713 (or 10952709 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 87621656 is about 9360.6439949397. The cubic root of 87621656 is about 444.1576557787.

The spelling of 87621656 in words is "eighty-seven million, six hundred twenty-one thousand, six hundred fifty-six".