91672864 has 24 divisors (see below), whose sum is σ = 182770560. Its totient is φ = 45254976.

The previous prime is 91672837. The next prime is 91672901. The reversal of 91672864 is 46827619.

It is a self number, because there is not a number n which added to its sum of digits gives 91672864.

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, 15604 + ... + 20659.

It is an arithmetic number, because the mean of its divisors is an integer number (7615440).

Almost surely, 2^91672864 is an apocalyptic number.

It is an amenable number.

91672864 is a deficient number, since it is larger than the sum of its proper divisors (91097696).

91672864 is a wasteful number, since it uses less digits than its factorization.

91672864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36352 (or 36344 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 91672864 is about 9574.5947172713. The cubic root of 91672864 is about 450.9000324151.

The spelling of 91672864 in words is "ninety-one million, six hundred seventy-two thousand, eight hundred sixty-four".