91275328 has 56 divisors (see below), whose sum is σ = 187634880. Its totient is φ = 44029440.

The previous prime is 91275311. The next prime is 91275341. The reversal of 91275328 is 82357219.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240643 + ... + 241021.

Almost surely, 2^91275328 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 91275328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93817440).

91275328 is an abundant number, since it is smaller than the sum of its proper divisors (96359552).

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

91275328 is a wasteful number, since it uses less digits than its factorization.

91275328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 505 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 91275328 is about 9553.8122234007. The cubic root of 91275328 is about 450.2473175487.

The spelling of 91275328 in words is "ninety-one million, two hundred seventy-five thousand, three hundred twenty-eight".