12320320 has 28 divisors (see below), whose sum is σ = 29338524. Its totient is φ = 4928000.

The previous prime is 12320309. The next prime is 12320339. The reversal of 12320320 is 2302321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7011904 + 5308416 = 2648^2 + 2304^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12320320.

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, 18931 + ... + 19570.

Almost surely, 2^12320320 is an apocalyptic number.

12320320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12320320 is an abundant number, since it is smaller than the sum of its proper divisors (17018204).

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

12320320 is an equidigital number, since it uses as much as digits as its factorization.

12320320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38518 (or 38508 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 12320320 is about 3510.0313388914. The cubic root of 12320320 is about 230.9620696953.

Adding to 12320320 its reverse (2302321), we get a palindrome (14622641).

The spelling of 12320320 in words is "twelve million, three hundred twenty thousand, three hundred twenty".