90215264 has 24 divisors (see below), whose sum is σ = 178128720. Its totient is φ = 44976256.

The previous prime is 90215261. The next prime is 90215291. The reversal of 90215264 is 46251209.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90215261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7562 + ... + 15414.

It is an arithmetic number, because the mean of its divisors is an integer number (7422030).

Almost surely, 2^90215264 is an apocalyptic number.

It is an amenable number.

90215264 is a deficient number, since it is larger than the sum of its proper divisors (87913456).

90215264 is a wasteful number, since it uses less digits than its factorization.

90215264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8222 (or 8214 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 90215264 is about 9498.1716135265. The cubic root of 90215264 is about 448.4974809569.

It can be divided in two parts, 902 and 15264, that multiplied together give a triangular number (13768128 = T₅₂₄₇).

The spelling of 90215264 in words is "ninety million, two hundred fifteen thousand, two hundred sixty-four".