90804864 has 32 divisors (see below), whose sum is σ = 241201440. Its totient is φ = 30268160.

The previous prime is 90804827. The next prime is 90804937. The reversal of 90804864 is 46840809.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117852 + ... + 118619.

It is an arithmetic number, because the mean of its divisors is an integer number (7537545).

Almost surely, 2^90804864 is an apocalyptic number.

It is an amenable number.

90804864 is an abundant number, since it is smaller than the sum of its proper divisors (150396576).

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

90804864 is a wasteful number, since it uses less digits than its factorization.

90804864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236488 (or 236476 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 90804864 is about 9529.1586197313. The cubic root of 90804864 is about 449.4724088413.

The spelling of 90804864 in words is "ninety million, eight hundred four thousand, eight hundred sixty-four".