91086192 has 60 divisors (see below), whose sum is σ = 258019944. Its totient is φ = 29992320.

The previous prime is 91086179. The next prime is 91086199. The reversal of 91086192 is 29168019.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91086199) 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, 8142 + ... + 15762.

Almost surely, 2^91086192 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 91086192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129009972).

91086192 is an abundant number, since it is smaller than the sum of its proper divisors (166933752).

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

91086192 is a wasteful number, since it uses less digits than its factorization.

91086192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7718 (or 7709 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 91086192 is about 9543.9086332592. The cubic root of 91086192 is about 449.9361094478.

The spelling of 91086192 in words is "ninety-one million, eighty-six thousand, one hundred ninety-two".