91280332 has 96 divisors (see below), whose sum is σ = 203777280. Its totient is φ = 35147520.

The previous prime is 91280311. The next prime is 91280333. The reversal of 91280332 is 23308219.

It is a self number, because there is not a number n which added to its sum of digits gives 91280332.

It is not an unprimeable number, because it can be changed into a prime (91280333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402003 + ... + 402229.

It is an arithmetic number, because the mean of its divisors is an integer number (2122680).

Almost surely, 2^91280332 is an apocalyptic number.

It is an amenable number.

91280332 is an abundant number, since it is smaller than the sum of its proper divisors (112496948).

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

91280332 is a wasteful number, since it uses less digits than its factorization.

91280332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 91280332 is about 9554.0741047995. The cubic root of 91280332 is about 450.2555453887.

The spelling of 91280332 in words is "ninety-one million, two hundred eighty thousand, three hundred thirty-two".