91572256 has 48 divisors (see below), whose sum is σ = 188538840. Its totient is φ = 43724800.

The previous prime is 91572211. The next prime is 91572263. The reversal of 91572256 is 65227519.

It can be written as a sum of positive squares in 4 ways, for example, as 88736400 + 2835856 = 9420^2 + 1684^2 .

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, 93240 + ... + 94216.

Almost surely, 2^91572256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91572256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94269420).

91572256 is an abundant number, since it is smaller than the sum of its proper divisors (96966584).

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

91572256 is a wasteful number, since it uses less digits than its factorization.

91572256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117 (or 1109 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 91572256 is about 9569.3393711374. The cubic root of 91572256 is about 450.7350226407.

The spelling of 91572256 in words is "ninety-one million, five hundred seventy-two thousand, two hundred fifty-six".