90031872 has 72 divisors (see below), whose sum is σ = 273863296. Its totient is φ = 25721856.

The previous prime is 90031831. The next prime is 90031883. The reversal of 90031872 is 27813009.

It is a happy number.

It is a congruent number.

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, 2998 + ... + 13749.

Almost surely, 2^90031872 is an apocalyptic number.

It is an amenable number.

90031872 is an abundant number, since it is smaller than the sum of its proper divisors (183831424).

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

90031872 is a wasteful number, since it uses less digits than its factorization.

90031872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16773 (or 16759 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 90031872 is about 9488.5126337061. The cubic root of 90031872 is about 448.1933689057.

The spelling of 90031872 in words is "ninety million, thirty-one thousand, eight hundred seventy-two".