12781968 has 20 divisors (see below), whose sum is σ = 33020208. Its totient is φ = 4260640.

The previous prime is 12781939. The next prime is 12782009. The reversal of 12781968 is 86918721.

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, 133098 + ... + 133193.

Almost surely, 2^12781968 is an apocalyptic number.

It is an amenable number.

12781968 is an abundant number, since it is smaller than the sum of its proper divisors (20238240).

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

12781968 is a wasteful number, since it uses less digits than its factorization.

12781968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266302 (or 266296 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The square root of 12781968 is about 3575.1878272337. The cubic root of 12781968 is about 233.8115218353.

The spelling of 12781968 in words is "twelve million, seven hundred eighty-one thousand, nine hundred sixty-eight".