13768728 has 32 divisors (see below), whose sum is σ = 34516800. Its totient is φ = 4576928.

The previous prime is 13768721. The next prime is 13768747. The reversal of 13768728 is 82786731.

It is a self number, because there is not a number n which added to its sum of digits gives 13768728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13768721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13003 + ... + 14021.

It is an arithmetic number, because the mean of its divisors is an integer number (1078650).

Almost surely, 2^13768728 is an apocalyptic number.

It is an amenable number.

13768728 is an abundant number, since it is smaller than the sum of its proper divisors (20748072).

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

13768728 is a wasteful number, since it uses less digits than its factorization.

13768728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591 (or 1587 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 13768728 is about 3710.6236672560. The cubic root of 13768728 is about 239.6797116431.

The spelling of 13768728 in words is "thirteen million, seven hundred sixty-eight thousand, seven hundred twenty-eight".