91404936 has 112 divisors (see below), whose sum is σ = 293798400. Its totient is φ = 26104032.

The previous prime is 91404919. The next prime is 91404947. The reversal of 91404936 is 63940419.

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 91404936.

It is a congruent number.

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 27 ways as a sum of consecutive naturals, for example, 39705 + ... + 41943.

It is an arithmetic number, because the mean of its divisors is an integer number (2623200).

Almost surely, 2^91404936 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 91404936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146899200).

91404936 is an abundant number, since it is smaller than the sum of its proper divisors (202393464).

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

91404936 is a wasteful number, since it uses less digits than its factorization.

91404936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270 (or 2251 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 91404936 is about 9560.5928686458. The cubic root of 91404936 is about 450.4603289445.

The spelling of 91404936 in words is "ninety-one million, four hundred four thousand, nine hundred thirty-six".