91268790 has 64 divisors (see below), whose sum is σ = 226195200. Its totient is φ = 23554944.

The previous prime is 91268789. The next prime is 91268791. The reversal of 91268790 is 9786219.

It is an interprime number because it is at equal distance from previous prime (91268789) and next prime (91268791).

It is a super-3 number, since 3×91268790³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91268791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179056 + ... + 179564.

It is an arithmetic number, because the mean of its divisors is an integer number (3534300).

Almost surely, 2^91268790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91268790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113097600).

91268790 is an abundant number, since it is smaller than the sum of its proper divisors (134926410).

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

91268790 is a wasteful number, since it uses less digits than its factorization.

91268790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 91268790 is about 9553.4700501964. The cubic root of 91268790 is about 450.2365669719.

The spelling of 91268790 in words is "ninety-one million, two hundred sixty-eight thousand, seven hundred ninety".