13340728 has 16 divisors (see below), whose sum is σ = 25245000. Its totient is φ = 6608736.

The previous prime is 13340711. The next prime is 13340729. The reversal of 13340728 is 82704331.

It is a junction number, because it is equal to n+sod(n) for n = 13340696 and 13340705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13340729) 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, 6778 + ... + 8521.

Almost surely, 2^13340728 is an apocalyptic number.

It is an amenable number.

13340728 is a deficient number, since it is larger than the sum of its proper divisors (11904272).

13340728 is a wasteful number, since it uses less digits than its factorization.

13340728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15414 (or 15410 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 13340728 is about 3652.4961327837. The cubic root of 13340728 is about 237.1700489318.

The spelling of 13340728 in words is "thirteen million, three hundred forty thousand, seven hundred twenty-eight".