91495872 has 112 divisors (see below), whose sum is σ = 289742880. Its totient is φ = 28145664.

The previous prime is 91495867. The next prime is 91495879. The reversal of 91495872 is 27859419.

91495872 is a `hidden beast` number, since 91 + 495 + 8 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91495879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20428 + ... + 24500.

It is an arithmetic number, because the mean of its divisors is an integer number (2586990).

Almost surely, 2^91495872 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 91495872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144871440).

91495872 is an abundant number, since it is smaller than the sum of its proper divisors (198247008).

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

91495872 is a wasteful number, since it uses less digits than its factorization.

91495872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107 (or 4091 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 91495872 is about 9565.3474584042. The cubic root of 91495872 is about 450.6096625416.

The spelling of 91495872 in words is "ninety-one million, four hundred ninety-five thousand, eight hundred seventy-two".