91415792 has 40 divisors (see below), whose sum is σ = 191539824. Its totient is φ = 42015744.

The previous prime is 91415791. The next prime is 91415803. The reversal of 91415792 is 29751419.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91415791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58088 + ... + 59640.

Almost surely, 2^91415792 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 91415792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95769912).

91415792 is an abundant number, since it is smaller than the sum of its proper divisors (100124032).

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

91415792 is a wasteful number, since it uses less digits than its factorization.

91415792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857 (or 1851 counting only the distinct ones).

The product of its digits is 22680, while the sum is 38.

The square root of 91415792 is about 9561.1605990068. The cubic root of 91415792 is about 450.4781616931.

The spelling of 91415792 in words is "ninety-one million, four hundred fifteen thousand, seven hundred ninety-two".