90638375 has 16 divisors (see below), whose sum is σ = 114980736. Its totient is φ = 71316000.

The previous prime is 90638371. The next prime is 90638381. The reversal of 90638375 is 57383609.

It is not a de Polignac number, because 90638375 - 2² = 90638371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90638371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1682 + ... + 13568.

It is an arithmetic number, because the mean of its divisors is an integer number (7186296).

Almost surely, 2^90638375 is an apocalyptic number.

90638375 is a deficient number, since it is larger than the sum of its proper divisors (24342361).

90638375 is a wasteful number, since it uses less digits than its factorization.

90638375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11963 (or 11953 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 90638375 is about 9520.4188458282. The cubic root of 90638375 is about 449.1975410655.

The spelling of 90638375 in words is "ninety million, six hundred thirty-eight thousand, three hundred seventy-five".