91868768 has 12 divisors (see below), whose sum is σ = 180866700. Its totient is φ = 45934368.

The previous prime is 91868759. The next prime is 91868771. The reversal of 91868768 is 86786819.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1435418 + ... + 1435481.

It is an arithmetic number, because the mean of its divisors is an integer number (15072225).

Almost surely, 2^91868768 is an apocalyptic number.

It is an amenable number.

91868768 is a deficient number, since it is larger than the sum of its proper divisors (88997932).

91868768 is a wasteful number, since it uses less digits than its factorization.

91868768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870909 (or 2870901 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 53.

The square root of 91868768 is about 9584.8196644486. The cubic root of 91868768 is about 451.2209935238.

The spelling of 91868768 in words is "ninety-one million, eight hundred sixty-eight thousand, seven hundred sixty-eight".