12744320 has 32 divisors (see below), whose sum is σ = 30468420. Its totient is φ = 5097472.

The previous prime is 12744289. The next prime is 12744331. The reversal of 12744320 is 2344721.

It can be written as a sum of positive squares in 2 ways, for example, as 10916416 + 1827904 = 3304^2 + 1352^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 9317 + ... + 10596.

Almost surely, 2^12744320 is an apocalyptic number.

12744320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12744320 is an abundant number, since it is smaller than the sum of its proper divisors (17724100).

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

12744320 is an equidigital number, since it uses as much as digits as its factorization.

12744320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19932 (or 19920 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 12744320 is about 3569.9187665828. The cubic root of 12744320 is about 233.5817399876.

The spelling of 12744320 in words is "twelve million, seven hundred forty-four thousand, three hundred twenty".