91820364 has 24 divisors (see below), whose sum is σ = 214874688. Its totient is φ = 30517200.

The previous prime is 91820359. The next prime is 91820381. The reversal of 91820364 is 46302819.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6862 + ... + 15189.

It is an arithmetic number, because the mean of its divisors is an integer number (8953112).

Almost surely, 2^91820364 is an apocalyptic number.

It is an amenable number.

91820364 is an abundant number, since it is smaller than the sum of its proper divisors (123054324).

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

91820364 is a wasteful number, since it uses less digits than its factorization.

91820364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22405 (or 22403 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 91820364 is about 9582.2942972964. The cubic root of 91820364 is about 451.1417328624.

The spelling of 91820364 in words is "ninety-one million, eight hundred twenty thousand, three hundred sixty-four".