91368732 has 72 divisors (see below), whose sum is σ = 267100176. Its totient is φ = 24095232.

The previous prime is 91368721. The next prime is 91368779. The reversal of 91368732 is 23786319.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 23 ways as a sum of consecutive naturals, for example, 1668 + ... + 13620.

Almost surely, 2^91368732 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 91368732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133550088).

91368732 is an abundant number, since it is smaller than the sum of its proper divisors (175731444).

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

91368732 is a wasteful number, since it uses less digits than its factorization.

91368732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11987 (or 11978 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 91368732 is about 9558.6992838984. The cubic root of 91368732 is about 450.4008477680.

The spelling of 91368732 in words is "ninety-one million, three hundred sixty-eight thousand, seven hundred thirty-two".