30912320 has 28 divisors (see below), whose sum is σ = 73610724. Its totient is φ = 12364800.

The previous prime is 30912247. The next prime is 30912359. The reversal of 30912320 is 2321903.

It can be written as a sum of positive squares in 2 ways, for example, as 12730624 + 18181696 = 3568^2 + 4264^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30912292 and 30912301.

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, 47981 + ... + 48620.

Almost surely, 2^30912320 is an apocalyptic number.

It is an amenable number.

30912320 is an abundant number, since it is smaller than the sum of its proper divisors (42698404).

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

30912320 is an equidigital number, since it uses as much as digits as its factorization.

30912320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96618 (or 96608 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 30912320 is about 5559.8848908948. The cubic root of 30912320 is about 313.8416175568.

The spelling of 30912320 in words is "thirty million, nine hundred twelve thousand, three hundred twenty".