91256290 has 16 divisors (see below), whose sum is σ = 164384640. Its totient is φ = 36475120.

The previous prime is 91256287. The next prime is 91256299. The reversal of 91256290 is 9265219.

It is not an unprimeable number, because it can be changed into a prime (91256299) 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, 15591 + ... + 20629.

It is an arithmetic number, because the mean of its divisors is an integer number (10274040).

Almost surely, 2^91256290 is an apocalyptic number.

91256290 is a deficient number, since it is larger than the sum of its proper divisors (73128350).

91256290 is a wasteful number, since it uses less digits than its factorization.

91256290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6857.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 91256290 is about 9552.8158152453. The cubic root of 91256290 is about 450.2160115187.

The spelling of 91256290 in words is "ninety-one million, two hundred fifty-six thousand, two hundred ninety".