91107772 has 48 divisors (see below), whose sum is σ = 186278400. Its totient is φ = 38187072.

The previous prime is 91107767. The next prime is 91107799. The reversal of 91107772 is 27770119.

It is a super-2 number, since 2×91107772² = 16601252237607968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457729 + ... + 457927.

It is an arithmetic number, because the mean of its divisors is an integer number (3880800).

Almost surely, 2^91107772 is an apocalyptic number.

It is an amenable number.

91107772 is an abundant number, since it is smaller than the sum of its proper divisors (95170628).

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

91107772 is a wasteful number, since it uses less digits than its factorization.

91107772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 34.

The square root of 91107772 is about 9545.0391303546. The cubic root of 91107772 is about 449.9716393649.

The spelling of 91107772 in words is "ninety-one million, one hundred seven thousand, seven hundred seventy-two".