91112472 has 128 divisors (see below), whose sum is σ = 285235200. Its totient is φ = 26697600.

The previous prime is 91112447. The next prime is 91112473. The reversal of 91112472 is 27421119.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91112473) 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 31 ways as a sum of consecutive naturals, for example, 73038 + ... + 74274.

It is an arithmetic number, because the mean of its divisors is an integer number (2228400).

Almost surely, 2^91112472 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 91112472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142617600).

91112472 is an abundant number, since it is smaller than the sum of its proper divisors (194122728).

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

91112472 is a wasteful number, since it uses less digits than its factorization.

91112472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1284 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 91112472 is about 9545.2853283702. The cubic root of 91112472 is about 449.9793768326.

The spelling of 91112472 in words is "ninety-one million, one hundred twelve thousand, four hundred seventy-two".