91120224 has 48 divisors (see below), whose sum is σ = 257593392. Its totient is φ = 28036608.

The previous prime is 91120217. The next prime is 91120241. The reversal of 91120224 is 42202119.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 91120224.

It is a congruent number.

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, 35259 + ... + 37754.

It is an arithmetic number, because the mean of its divisors is an integer number (5366529).

Almost surely, 2^91120224 is an apocalyptic number.

It is an amenable number.

91120224 is an abundant number, since it is smaller than the sum of its proper divisors (166473168).

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

91120224 is a wasteful number, since it uses less digits than its factorization.

91120224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73039 (or 73031 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 91120224 is about 9545.6913840748. The cubic root of 91120224 is about 449.9921381343.

The spelling of 91120224 in words is "ninety-one million, one hundred twenty thousand, two hundred twenty-four".