91804872 has 32 divisors (see below), whose sum is σ = 230849280. Its totient is φ = 30423360.

The previous prime is 91804861. The next prime is 91804897. The reversal of 91804872 is 27840819.

It is a self number, because there is not a number n which added to its sum of digits gives 91804872.

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 7 ways as a sum of consecutive naturals, for example, 6904 + ... + 15207.

It is an arithmetic number, because the mean of its divisors is an integer number (7214040).

Almost surely, 2^91804872 is an apocalyptic number.

It is an amenable number.

91804872 is an abundant number, since it is smaller than the sum of its proper divisors (139044408).

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

91804872 is a wasteful number, since it uses less digits than its factorization.

91804872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22293 (or 22289 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 91804872 is about 9581.4858972917. The cubic root of 91804872 is about 451.1163591126.

The spelling of 91804872 in words is "ninety-one million, eight hundred four thousand, eight hundred seventy-two".