13728243 has 8 divisors (see below), whose sum is σ = 18322128. Its totient is φ = 9143264.

The previous prime is 13728229. The next prime is 13728251. The reversal of 13728243 is 34282731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13728243 - 2¹⁸ = 13466099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13728243.

It is not an unprimeable number, because it can be changed into a prime (13728343) 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, 3421 + ... + 6257.

It is an arithmetic number, because the mean of its divisors is an integer number (2290266).

Almost surely, 2^13728243 is an apocalyptic number.

13728243 is a deficient number, since it is larger than the sum of its proper divisors (4593885).

13728243 is a wasteful number, since it uses less digits than its factorization.

13728243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453.

The product of its digits is 8064, while the sum is 30.

The square root of 13728243 is about 3705.1643688236. The cubic root of 13728243 is about 239.4445662417. Note that the first 3 decimals are identical.

The spelling of 13728243 in words is "thirteen million, seven hundred twenty-eight thousand, two hundred forty-three".