13323728 has 20 divisors (see below), whose sum is σ = 28161888. Its totient is φ = 6056160.

The previous prime is 13323721. The next prime is 13323749. The reversal of 13323728 is 82732331.

13323728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13323728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13323721) 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, 37676 + ... + 38027.

Almost surely, 2^13323728 is an apocalyptic number.

It is an amenable number.

13323728 is an abundant number, since it is smaller than the sum of its proper divisors (14838160).

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

13323728 is a wasteful number, since it uses less digits than its factorization.

13323728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75722 (or 75716 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 13323728 is about 3650.1682153019. The cubic root of 13323728 is about 237.0692647105.

The spelling of 13323728 in words is "thirteen million, three hundred twenty-three thousand, seven hundred twenty-eight".