91922768 has 40 divisors (see below), whose sum is σ = 206349888. Its totient is φ = 38852352.

The previous prime is 91922759. The next prime is 91922773. The reversal of 91922768 is 86722919.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2555 + ... + 13797.

Almost surely, 2^91922768 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 91922768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103174944).

91922768 is an abundant number, since it is smaller than the sum of its proper divisors (114427120).

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

91922768 is a wasteful number, since it uses less digits than its factorization.

91922768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11331 (or 11325 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 91922768 is about 9587.6362050299. The cubic root of 91922768 is about 451.3093846847.

The spelling of 91922768 in words is "ninety-one million, nine hundred twenty-two thousand, seven hundred sixty-eight".