13828728 has 32 divisors (see below), whose sum is σ = 35688960. Its totient is φ = 4460640.

The previous prime is 13828723. The next prime is 13828777. The reversal of 13828728 is 82782831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13828723) 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, 8550 + ... + 10037.

It is an arithmetic number, because the mean of its divisors is an integer number (1115280).

Almost surely, 2^13828728 is an apocalyptic number.

It is an amenable number.

13828728 is an abundant number, since it is smaller than the sum of its proper divisors (21860232).

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

13828728 is a wasteful number, since it uses less digits than its factorization.

13828728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18627 (or 18623 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 13828728 is about 3718.6997727700. The cubic root of 13828728 is about 240.0273579924.

The spelling of 13828728 in words is "thirteen million, eight hundred twenty-eight thousand, seven hundred twenty-eight".