91090344 has 32 divisors (see below), whose sum is σ = 228100320. Its totient is φ = 30313536.

The previous prime is 91090339. The next prime is 91090379. The reversal of 91090344 is 44309019.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13614 + ... + 19170.

It is an arithmetic number, because the mean of its divisors is an integer number (7128135).

Almost surely, 2^91090344 is an apocalyptic number.

It is an amenable number.

91090344 is an abundant number, since it is smaller than the sum of its proper divisors (137009976).

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

91090344 is a wasteful number, since it uses less digits than its factorization.

91090344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6249 (or 6245 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 91090344 is about 9544.1261517228. The cubic root of 91090344 is about 449.9429458530.

The spelling of 91090344 in words is "ninety-one million, ninety thousand, three hundred forty-four".