12356728 has 16 divisors (see below), whose sum is σ = 23301000. Its totient is φ = 6143136.

The previous prime is 12356717. The next prime is 12356731. The reversal of 12356728 is 82765321.

It is a happy number.

12356728 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 = 12356693 and 12356702.

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, 2883 + ... + 5746.

Almost surely, 2^12356728 is an apocalyptic number.

It is an amenable number.

12356728 is a deficient number, since it is larger than the sum of its proper divisors (10944272).

12356728 is a wasteful number, since it uses less digits than its factorization.

12356728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8814 (or 8810 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 12356728 is about 3515.2137915069. The cubic root of 12356728 is about 231.1893526863.

The spelling of 12356728 in words is "twelve million, three hundred fifty-six thousand, seven hundred twenty-eight".