90638072408 has 32 divisors (see below), whose sum is σ = 183034177200. Its totient is φ = 41829529728.

The previous prime is 90638072341. The next prime is 90638072431. The reversal of 90638072408 is 80427083609.

It is a congruent number.

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, 1597535 + ... + 1653297.

Almost surely, 2^90638072408 is an apocalyptic number.

It is an amenable number.

90638072408 is an abundant number, since it is smaller than the sum of its proper divisors (92396104792).

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

90638072408 is a wasteful number, since it uses less digits than its factorization.

90638072408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71411 (or 71407 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 90638072408 in words is "ninety billion, six hundred thirty-eight million, seventy-two thousand, four hundred eight".