90591172 has 24 divisors (see below), whose sum is σ = 183738240. Its totient is φ = 38277120.

The previous prime is 90591143. The next prime is 90591191. The reversal of 90591172 is 27119509.

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, 20797 + ... + 24772.

It is an arithmetic number, because the mean of its divisors is an integer number (7655760).

Almost surely, 2^90591172 is an apocalyptic number.

It is an amenable number.

90591172 is an abundant number, since it is smaller than the sum of its proper divisors (93147068).

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

90591172 is a wasteful number, since it uses less digits than its factorization.

90591172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45651 (or 45649 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 90591172 is about 9517.9394828923. The cubic root of 90591172 is about 449.1195492531.

The spelling of 90591172 in words is "ninety million, five hundred ninety-one thousand, one hundred seventy-two".