90290864 has 20 divisors (see below), whose sum is σ = 175249200. Its totient is φ = 45065280.

The previous prime is 90290843. The next prime is 90290881. The reversal of 90290864 is 46809209.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4874 + ... + 14294.

It is an arithmetic number, because the mean of its divisors is an integer number (8762460).

Almost surely, 2^90290864 is an apocalyptic number.

It is an amenable number.

90290864 is a deficient number, since it is larger than the sum of its proper divisors (84958336).

90290864 is a wasteful number, since it uses less digits than its factorization.

90290864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10028 (or 10022 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 90290864 is about 9502.1504934409. The cubic root of 90290864 is about 448.6227256266.

The spelling of 90290864 in words is "ninety million, two hundred ninety thousand, eight hundred sixty-four".