91372288 has 36 divisors (see below), whose sum is σ = 208447120. Its totient is φ = 39158784.

The previous prime is 91372279. The next prime is 91372289. The reversal of 91372288 is 88227319.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 91372288.

It is not an unprimeable number, because it can be changed into a prime (91372289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23703 + ... + 27286.

Almost surely, 2^91372288 is an apocalyptic number.

It is an amenable number.

91372288 is an abundant number, since it is smaller than the sum of its proper divisors (117074832).

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

91372288 is an equidigital number, since it uses as much as digits as its factorization.

91372288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51012 (or 50998 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 91372288 is about 9558.8852906602. The cubic root of 91372288 is about 450.4066907757.

The spelling of 91372288 in words is "ninety-one million, three hundred seventy-two thousand, two hundred eighty-eight".