13728369 has 16 divisors (see below), whose sum is σ = 18906368. Its totient is φ = 8854272.

The previous prime is 13728353. The next prime is 13728391. The reversal of 13728369 is 96382731.

It is not a de Polignac number, because 13728369 - 2⁴ = 13728353 is a prime.

It is a super-2 number, since 2×13728369² = 376936230800322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13728329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37224 + ... + 37590.

It is an arithmetic number, because the mean of its divisors is an integer number (1181648).

Almost surely, 2^13728369 is an apocalyptic number.

It is an amenable number.

13728369 is a deficient number, since it is larger than the sum of its proper divisors (5177999).

13728369 is a wasteful number, since it uses less digits than its factorization.

13728369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744.

The product of its digits is 54432, while the sum is 39.

The square root of 13728369 is about 3705.1813720788. The cubic root of 13728369 is about 239.4452987929.

The spelling of 13728369 in words is "thirteen million, seven hundred twenty-eight thousand, three hundred sixty-nine".