91748832 has 48 divisors (see below), whose sum is σ = 275248512. Its totient is φ = 26213760.

The previous prime is 91748831. The next prime is 91748843. The reversal of 91748832 is 23884719.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91748831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67594 + ... + 68937.

It is an arithmetic number, because the mean of its divisors is an integer number (5734344).

Almost surely, 2^91748832 is an apocalyptic number.

It is an amenable number.

91748832 is an abundant number, since it is smaller than the sum of its proper divisors (183499680).

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

91748832 is a wasteful number, since it uses less digits than its factorization.

91748832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136551 (or 136543 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 91748832 is about 9578.5610610363. The cubic root of 91748832 is about 451.0245495099.

The spelling of 91748832 in words is "ninety-one million, seven hundred forty-eight thousand, eight hundred thirty-two".