91955328 has 64 divisors (see below), whose sum is σ = 249981600. Its totient is φ = 29933568.

The previous prime is 91955327. The next prime is 91955341. The reversal of 91955328 is 82355919.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 91955328.

It is not an unprimeable number, because it can be changed into a prime (91955327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13728 + ... + 19296.

Almost surely, 2^91955328 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 91955328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124990800).

91955328 is an abundant number, since it is smaller than the sum of its proper divisors (158026272).

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

91955328 is a wasteful number, since it uses less digits than its factorization.

91955328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629 (or 5617 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 91955328 is about 9589.3340748980. The cubic root of 91955328 is about 451.3626645529.

The spelling of 91955328 in words is "ninety-one million, nine hundred fifty-five thousand, three hundred twenty-eight".