13165728 has 24 divisors (see below), whose sum is σ = 34560288. Its totient is φ = 4388544.

The previous prime is 13165721. The next prime is 13165751. The reversal of 13165728 is 82756131.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (13165721) 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, 68476 + ... + 68667.

It is an arithmetic number, because the mean of its divisors is an integer number (1440012).

Almost surely, 2^13165728 is an apocalyptic number.

It is an amenable number.

13165728 is an abundant number, since it is smaller than the sum of its proper divisors (21394560).

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

13165728 is a wasteful number, since it uses less digits than its factorization.

13165728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137156 (or 137148 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 13165728 is about 3628.4608307105. The cubic root of 13165728 is about 236.1284372225.

The spelling of 13165728 in words is "thirteen million, one hundred sixty-five thousand, seven hundred twenty-eight".