90638528 has 28 divisors (see below), whose sum is σ = 180164232. Its totient is φ = 45242880.

The previous prime is 90638521. The next prime is 90638549. The reversal of 90638528 is 82583609.

It is not an unprimeable number, because it can be changed into a prime (90638521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69563 + ... + 70853.

Almost surely, 2^90638528 is an apocalyptic number.

It is an amenable number.

90638528 is a deficient number, since it is larger than the sum of its proper divisors (89525704).

90638528 is a wasteful number, since it uses less digits than its factorization.

90638528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 90638528 is about 9520.4268811855. The cubic root of 90638528 is about 449.1977938178.

The spelling of 90638528 in words is "ninety million, six hundred thirty-eight thousand, five hundred twenty-eight".