12720344 has 64 divisors (see below), whose sum is σ = 29816640. Its totient is φ = 4953600.

The previous prime is 12720317. The next prime is 12720347. The reversal of 12720344 is 44302721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73442 + ... + 73614.

It is an arithmetic number, because the mean of its divisors is an integer number (465885).

Almost surely, 2^12720344 is an apocalyptic number.

12720344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12720344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14908320).

12720344 is an abundant number, since it is smaller than the sum of its proper divisors (17096296).

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

12720344 is a wasteful number, since it uses less digits than its factorization.

12720344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300 (or 296 counting only the distinct ones).

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

The square root of 12720344 is about 3566.5591261046. The cubic root of 12720344 is about 233.4351682476.

The spelling of 12720344 in words is "twelve million, seven hundred twenty thousand, three hundred forty-four".