87656544 has 36 divisors (see below), whose sum is σ = 249274116. Its totient is φ = 29218752.

The previous prime is 87656537. The next prime is 87656563. The reversal of 87656544 is 44565678.

87656544 is a `hidden beast` number, since 87 + 6 + 565 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 87656544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151894 + ... + 152469.

It is an arithmetic number, because the mean of its divisors is an integer number (6924281).

Almost surely, 2^87656544 is an apocalyptic number.

It is an amenable number.

87656544 is an abundant number, since it is smaller than the sum of its proper divisors (161617572).

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

87656544 is a wasteful number, since it uses less digits than its factorization.

87656544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304379 (or 304368 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 87656544 is about 9362.5073564724. The cubic root of 87656544 is about 444.2165975092.

The spelling of 87656544 in words is "eighty-seven million, six hundred fifty-six thousand, five hundred forty-four".