91274392 has 32 divisors (see below), whose sum is σ = 188190720. Its totient is φ = 41156640.

The previous prime is 91274387. The next prime is 91274401. The reversal of 91274392 is 29347219.

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 7 ways as a sum of consecutive naturals, for example, 7093 + ... + 15259.

It is an arithmetic number, because the mean of its divisors is an integer number (5880960).

Almost surely, 2^91274392 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 91274392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94095360).

91274392 is an abundant number, since it is smaller than the sum of its proper divisors (96916328).

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

91274392 is a wasteful number, since it uses less digits than its factorization.

91274392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8311 (or 8307 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 91274392 is about 9553.7632375939. The cubic root of 91274392 is about 450.2457784948.

The spelling of 91274392 in words is "ninety-one million, two hundred seventy-four thousand, three hundred ninety-two".