91323072 has 112 divisors (see below), whose sum is σ = 275234400. Its totient is φ = 29675520.

The previous prime is 91323061. The next prime is 91323107. The reversal of 91323072 is 27032319.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 70204 + ... + 71492.

It is an arithmetic number, because the mean of its divisors is an integer number (2457450).

Almost surely, 2^91323072 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 91323072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137617200).

91323072 is an abundant number, since it is smaller than the sum of its proper divisors (183911328).

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

91323072 is a wasteful number, since it uses less digits than its factorization.

91323072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 91323072 is about 9556.3105851579. The cubic root of 91323072 is about 450.3258084960.

The spelling of 91323072 in words is "ninety-one million, three hundred twenty-three thousand, seventy-two".