91092320 has 96 divisors (see below), whose sum is σ = 238321440. Its totient is φ = 32624640.

The previous prime is 91092317. The next prime is 91092347. The reversal of 91092320 is 2329019.

It is a self number, because there is not a number n which added to its sum of digits gives 91092320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128126 + ... + 128834.

It is an arithmetic number, because the mean of its divisors is an integer number (2482515).

Almost surely, 2^91092320 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 91092320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119160720).

91092320 is an abundant number, since it is smaller than the sum of its proper divisors (147229120).

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

91092320 is a wasteful number, since it uses less digits than its factorization.

91092320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 91092320 is about 9544.2296703296. The cubic root of 91092320 is about 449.9461993293.

The spelling of 91092320 in words is "ninety-one million, ninety-two thousand, three hundred twenty".