90397688 has 8 divisors (see below), whose sum is σ = 169495680. Its totient is φ = 45198840.

The previous prime is 90397679. The next prime is 90397753. The reversal of 90397688 is 88679309.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5649848 + ... + 5649863.

It is an arithmetic number, because the mean of its divisors is an integer number (21186960).

Almost surely, 2^90397688 is an apocalyptic number.

It is an amenable number.

90397688 is a deficient number, since it is larger than the sum of its proper divisors (79097992).

90397688 is a wasteful number, since it uses less digits than its factorization.

90397688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11299717 (or 11299713 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 90397688 is about 9507.7698752126. The cubic root of 90397688 is about 448.7995792036.

The spelling of 90397688 in words is "ninety million, three hundred ninety-seven thousand, six hundred eighty-eight".