87656644 has 6 divisors (see below), whose sum is σ = 153399134. Its totient is φ = 43828320.

The previous prime is 87656603. The next prime is 87656659. The reversal of 87656644 is 44665678.

It can be written as a sum of positive squares in only one way, i.e., 45562500 + 42094144 = 6750^2 + 6488^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87656594 and 87656603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10957077 + ... + 10957084.

Almost surely, 2^87656644 is an apocalyptic number.

It is an amenable number.

87656644 is a deficient number, since it is larger than the sum of its proper divisors (65742490).

87656644 is a wasteful number, since it uses less digits than its factorization.

87656644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21914165 (or 21914163 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 87656644 is about 9362.5126969206. The cubic root of 87656644 is about 444.2167664323.

The spelling of 87656644 in words is "eighty-seven million, six hundred fifty-six thousand, six hundred forty-four".