12839720 has 32 divisors (see below), whose sum is σ = 29025000. Its totient is φ = 5111808.

The previous prime is 12839719. The next prime is 12839747. The reversal of 12839720 is 2793821.

12839720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12432676 + 407044 = 3526^2 + 638^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9656 + ... + 10904.

Almost surely, 2^12839720 is an apocalyptic number.

12839720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12839720 is an abundant number, since it is smaller than the sum of its proper divisors (16185280).

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

12839720 is a wasteful number, since it uses less digits than its factorization.

12839720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 12839720 is about 3583.2555030307. The cubic root of 12839720 is about 234.1631316755.

The spelling of 12839720 in words is "twelve million, eight hundred thirty-nine thousand, seven hundred twenty".