90521872 has 40 divisors (see below), whose sum is σ = 212236416. Its totient is φ = 36512256.

The previous prime is 90521867. The next prime is 90521881. The reversal of 90521872 is 27812509.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an alternating number because its digits alternate between odd and even.

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, 21868 + ... + 25675.

Almost surely, 2^90521872 is an apocalyptic number.

It is an amenable number.

90521872 is an abundant number, since it is smaller than the sum of its proper divisors (121714544).

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

90521872 is a wasteful number, since it uses less digits than its factorization.

90521872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47575 (or 47569 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 90521872 is about 9514.2982925700. The cubic root of 90521872 is about 449.0049982661.

The spelling of 90521872 in words is "ninety million, five hundred twenty-one thousand, eight hundred seventy-two".