12896984728 has 16 divisors (see below), whose sum is σ = 24239291760. Its totient is φ = 6433173600.

The previous prime is 12896984707. The next prime is 12896984731. The reversal of 12896984728 is 82748969821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12896984728.

It is a congruent number.

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, 1911268 + ... + 1918003.

It is an arithmetic number, because the mean of its divisors is an integer number (1514955735).

Almost surely, 2^12896984728 is an apocalyptic number.

It is an amenable number.

12896984728 is a deficient number, since it is larger than the sum of its proper divisors (11342307032).

12896984728 is a wasteful number, since it uses less digits than its factorization.

12896984728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829698 (or 3829694 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 64.

The spelling of 12896984728 in words is "twelve billion, eight hundred ninety-six million, nine hundred eighty-four thousand, seven hundred twenty-eight".