91274320 has 20 divisors (see below), whose sum is σ = 212212980. Its totient is φ = 36509696.

The previous prime is 91274299. The next prime is 91274341. The reversal of 91274320 is 2347219.

It is an interprime number because it is at equal distance from previous prime (91274299) and next prime (91274341).

It can be written as a sum of positive squares in 2 ways, for example, as 58920976 + 32353344 = 7676^2 + 5688^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570385 + ... + 570544.

It is an arithmetic number, because the mean of its divisors is an integer number (10610649).

Almost surely, 2^91274320 is an apocalyptic number.

It is an amenable number.

91274320 is an abundant number, since it is smaller than the sum of its proper divisors (120938660).

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

91274320 is a wasteful number, since it uses less digits than its factorization.

91274320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140942 (or 1140936 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 91274320 is about 9553.7594694445. The cubic root of 91274320 is about 450.2456601056.

The spelling of 91274320 in words is "ninety-one million, two hundred seventy-four thousand, three hundred twenty".