13656728 has 16 divisors (see below), whose sum is σ = 25834680. Its totient is φ = 6767488.

The previous prime is 13656697. The next prime is 13656739. The reversal of 13656728 is 82765631.

It is a junction number, because it is equal to n+sod(n) for n = 13656691 and 13656700.

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, 6650 + ... + 8457.

Almost surely, 2^13656728 is an apocalyptic number.

It is an amenable number.

13656728 is a deficient number, since it is larger than the sum of its proper divisors (12177952).

13656728 is a wasteful number, since it uses less digits than its factorization.

13656728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15226 (or 15222 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 13656728 is about 3695.5010485724. The cubic root of 13656728 is about 239.0280599397.

The spelling of 13656728 in words is "thirteen million, six hundred fifty-six thousand, seven hundred twenty-eight".