90638960 has 20 divisors (see below), whose sum is σ = 210735768. Its totient is φ = 36255552.

The previous prime is 90638959. The next prime is 90638971. The reversal of 90638960 is 6983609.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566414 + ... + 566573.

Almost surely, 2^90638960 is an apocalyptic number.

It is an amenable number.

90638960 is an abundant number, since it is smaller than the sum of its proper divisors (120096808).

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

90638960 is a wasteful number, since it uses less digits than its factorization.

90638960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133000 (or 1132994 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 90638960 is about 9520.4495692168. The cubic root of 90638960 is about 449.1985074700.

The spelling of 90638960 in words is "ninety million, six hundred thirty-eight thousand, nine hundred sixty".