90791172 has 48 divisors (see below), whose sum is σ = 236476800. Its totient is φ = 30123360.

The previous prime is 90791167. The next prime is 90791201. The reversal of 90791172 is 27119709.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22897 + ... + 26567.

It is an arithmetic number, because the mean of its divisors is an integer number (4926600).

Almost surely, 2^90791172 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 90791172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118238400).

90791172 is an abundant number, since it is smaller than the sum of its proper divisors (145685628).

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

90791172 is a wasteful number, since it uses less digits than its factorization.

90791172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913 (or 3905 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 90791172 is about 9528.4401661552. The cubic root of 90791172 is about 449.4498164922.

The spelling of 90791172 in words is "ninety million, seven hundred ninety-one thousand, one hundred seventy-two".