91968768 has 108 divisors (see below), whose sum is σ = 267845760. Its totient is φ = 30348288.

The previous prime is 91968761. The next prime is 91968809. The reversal of 91968768 is 86786919.

It is a super-3 number, since 3×91968768³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91968761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412305 + ... + 412527.

Almost surely, 2^91968768 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 91968768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133922880).

91968768 is an abundant number, since it is smaller than the sum of its proper divisors (175876992).

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

91968768 is a wasteful number, since it uses less digits than its factorization.

91968768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 407 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 91968768 is about 9590.0348278825. The cubic root of 91968768 is about 451.3846535586.

The spelling of 91968768 in words is "ninety-one million, nine hundred sixty-eight thousand, seven hundred sixty-eight".