87816868 has 24 divisors (see below), whose sum is σ = 157659264. Its totient is φ = 42780000.

The previous prime is 87816857. The next prime is 87816871. The reversal of 87816868 is 86861878.

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, 46258 + ... + 48118.

It is an arithmetic number, because the mean of its divisors is an integer number (6569136).

Almost surely, 2^87816868 is an apocalyptic number.

It is an amenable number.

87816868 is a deficient number, since it is larger than the sum of its proper divisors (69842396).

87816868 is a wasteful number, since it uses less digits than its factorization.

87816868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163 (or 2161 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 52.

The square root of 87816868 is about 9371.0654677043. The cubic root of 87816868 is about 444.4872569221.

The spelling of 87816868 in words is "eighty-seven million, eight hundred sixteen thousand, eight hundred sixty-eight".