12756728 has 16 divisors (see below), whose sum is σ = 23976000. Its totient is φ = 6363136.

The previous prime is 12756727. The next prime is 12756739. The reversal of 12756728 is 82765721.

12756728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12756691 and 12756700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12756727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2168 + ... + 5496.

It is an arithmetic number, because the mean of its divisors is an integer number (1498500).

Almost surely, 2^12756728 is an apocalyptic number.

It is an amenable number.

12756728 is a deficient number, since it is larger than the sum of its proper divisors (11219272).

12756728 is a wasteful number, since it uses less digits than its factorization.

12756728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814 (or 3810 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 12756728 is about 3571.6561984603. The cubic root of 12756728 is about 233.6575212543.

The spelling of 12756728 in words is "twelve million, seven hundred fifty-six thousand, seven hundred twenty-eight".