90917568 has 84 divisors (see below), whose sum is σ = 297840400. Its totient is φ = 25975296.

The previous prime is 90917549. The next prime is 90917569. The reversal of 90917568 is 86571909.

It is a tau number, because it is divible by the number of its divisors (84).

It is not an unprimeable number, because it can be changed into a prime (90917569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7243 + ... + 15306.

Almost surely, 2^90917568 is an apocalyptic number.

It is an amenable number.

90917568 is an abundant number, since it is smaller than the sum of its proper divisors (206922832).

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

90917568 is a wasteful number, since it uses less digits than its factorization.

90917568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22574 (or 22561 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 90917568 is about 9535.0704244908. The cubic root of 90917568 is about 449.6582887325.

The spelling of 90917568 in words is "ninety million, nine hundred seventeen thousand, five hundred sixty-eight".