13868728 has 16 divisors (see below), whose sum is σ = 26901000. Its totient is φ = 6695136.

The previous prime is 13868711. The next prime is 13868731. The reversal of 13868728 is 82786831.

It is a happy number.

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, 29658 + ... + 30121.

Almost surely, 2^13868728 is an apocalyptic number.

It is an amenable number.

13868728 is a deficient number, since it is larger than the sum of its proper divisors (13032272).

13868728 is a wasteful number, since it uses less digits than its factorization.

13868728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59814 (or 59810 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 13868728 is about 3724.0741131186. The cubic root of 13868728 is about 240.2585639288.

The spelling of 13868728 in words is "thirteen million, eight hundred sixty-eight thousand, seven hundred twenty-eight".