91292292 has 144 divisors (see below), whose sum is σ = 296728320. Its totient is φ = 24058944.

The previous prime is 91292269. The next prime is 91292309. The reversal of 91292292 is 29229219.

It is a super-2 number, since 2×91292292² = 16668565157226528, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68133 + ... + 69459.

Almost surely, 2^91292292 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 91292292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148364160).

91292292 is an abundant number, since it is smaller than the sum of its proper divisors (205436028).

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

91292292 is a wasteful number, since it uses less digits than its factorization.

91292292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 1352 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 91292292 is about 9554.6999952903. The cubic root of 91292292 is about 450.2752094318.

The spelling of 91292292 in words is "ninety-one million, two hundred ninety-two thousand, two hundred ninety-two".