91800396 has 36 divisors (see below), whose sum is σ = 232820952. Its totient is φ = 30498624.

The previous prime is 91800377. The next prime is 91800421. The reversal of 91800396 is 69300819.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 91800396.

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 11 ways as a sum of consecutive naturals, for example, 7195 + ... + 15341.

Almost surely, 2^91800396 is an apocalyptic number.

It is an amenable number.

91800396 is an abundant number, since it is smaller than the sum of its proper divisors (141020556).

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

91800396 is a wasteful number, since it uses less digits than its factorization.

91800396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8470 (or 8465 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 91800396 is about 9581.2523189821. The cubic root of 91800396 is about 451.1090275131.

The spelling of 91800396 in words is "ninety-one million, eight hundred thousand, three hundred ninety-six".