91170864 has 60 divisors (see below), whose sum is σ = 270167976. Its totient is φ = 28601856.

The previous prime is 91170851. The next prime is 91170869. The reversal of 91170864 is 46807119.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (91170869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16174 + ... + 21069.

Almost surely, 2^91170864 is an apocalyptic number.

It is an amenable number.

91170864 is an abundant number, since it is smaller than the sum of its proper divisors (178997112).

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

91170864 is a wasteful number, since it uses less digits than its factorization.

91170864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37274 (or 37265 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 91170864 is about 9548.3435212606. The cubic root of 91170864 is about 450.0754836339.

The spelling of 91170864 in words is "ninety-one million, one hundred seventy thousand, eight hundred sixty-four".