91804400 has 60 divisors (see below), whose sum is σ = 226557672. Its totient is φ = 35723520.

The previous prime is 91804397. The next prime is 91804421. The reversal of 91804400 is 440819.

It is a self number, because there is not a number n which added to its sum of digits gives 91804400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11699 + ... + 17901.

Almost surely, 2^91804400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91804400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113278836).

91804400 is an abundant number, since it is smaller than the sum of its proper divisors (134753272).

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

91804400 is a wasteful number, since it uses less digits than its factorization.

91804400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6258 (or 6247 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 91804400 is about 9581.4612664249. The cubic root of 91804400 is about 451.1155859971.

The spelling of 91804400 in words is "ninety-one million, eight hundred four thousand, four hundred".