90717172 has 72 divisors (see below), whose sum is σ = 207009600. Its totient is φ = 33965568.

The previous prime is 90717167. The next prime is 90717199. The reversal of 90717172 is 27171709.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89404 + ... + 90412.

Almost surely, 2^90717172 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 90717172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103504800).

90717172 is an abundant number, since it is smaller than the sum of its proper divisors (116292428).

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

90717172 is a wasteful number, since it uses less digits than its factorization.

90717172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 34.

The square root of 90717172 is about 9524.5562626298. The cubic root of 90717172 is about 449.3276741963.

The spelling of 90717172 in words is "ninety million, seven hundred seventeen thousand, one hundred seventy-two".