90388872 has 80 divisors (see below), whose sum is σ = 289354560. Its totient is φ = 25824096.

The previous prime is 90388861. The next prime is 90388927. The reversal of 90388872 is 27888309.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5428 + ... + 14499.

It is an arithmetic number, because the mean of its divisors is an integer number (3616932).

Almost surely, 2^90388872 is an apocalyptic number.

It is an amenable number.

90388872 is an abundant number, since it is smaller than the sum of its proper divisors (198965688).

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

90388872 is a wasteful number, since it uses less digits than its factorization.

90388872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19952 (or 19939 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 90388872 is about 9507.3062430954. The cubic root of 90388872 is about 448.7849890601.

The spelling of 90388872 in words is "ninety million, three hundred eighty-eight thousand, eight hundred seventy-two".