27687656 has 16 divisors (see below), whose sum is σ = 52766340. Its totient is φ = 13616640.

The previous prime is 27687643. The next prime is 27687689. The reversal of 27687656 is 65678672.

It can be written as a sum of positive squares in 2 ways, for example, as 25908100 + 1779556 = 5090^2 + 1334^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27687656.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27881 + ... + 28856.

Almost surely, 2^27687656 is an apocalyptic number.

It is an amenable number.

27687656 is a deficient number, since it is larger than the sum of its proper divisors (25078684).

27687656 is a wasteful number, since it uses less digits than its factorization.

27687656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56804 (or 56800 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The square root of 27687656 is about 5261.9061185088. The cubic root of 27687656 is about 302.5255530175.

The spelling of 27687656 in words is "twenty-seven million, six hundred eighty-seven thousand, six hundred fifty-six".