12768656 has 20 divisors (see below), whose sum is σ = 24824304. Its totient is φ = 6362400.

The previous prime is 12768641. The next prime is 12768667. The reversal of 12768656 is 65686721.

It is a super-3 number, since 3×12768656³ (a number of 22 digits) contains 333 as substring.

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, 4091 + ... + 6501.

Almost surely, 2^12768656 is an apocalyptic number.

12768656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12768656 is a deficient number, since it is larger than the sum of its proper divisors (12055648).

12768656 is a wasteful number, since it uses less digits than its factorization.

12768656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750 (or 2744 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 12768656 is about 3573.3256218822. The cubic root of 12768656 is about 233.7303246329.

The spelling of 12768656 in words is "twelve million, seven hundred sixty-eight thousand, six hundred fifty-six".