13756728 has 16 divisors (see below), whose sum is σ = 34391880. Its totient is φ = 4585568.

The previous prime is 13756709. The next prime is 13756739. The reversal of 13756728 is 82765731.

13756728 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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, 286575 + ... + 286622.

Almost surely, 2^13756728 is an apocalyptic number.

It is an amenable number.

13756728 is an abundant number, since it is smaller than the sum of its proper divisors (20635152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13756728 is a wasteful number, since it uses less digits than its factorization.

13756728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573206 (or 573202 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 13756728 is about 3709.0063359342. The cubic root of 13756728 is about 239.6100612366.

It can be divided in two parts, 137 and 56728, that added together give a palindrome (56865).

The spelling of 13756728 in words is "thirteen million, seven hundred fifty-six thousand, seven hundred twenty-eight".