13728415 has 16 divisors (see below), whose sum is σ = 16912800. Its totient is φ = 10694272.

The previous prime is 13728409. The next prime is 13728419. The reversal of 13728415 is 51482731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13728415 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13728419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50901 + ... + 51169.

It is an arithmetic number, because the mean of its divisors is an integer number (1057050).

Almost surely, 2^13728415 is an apocalyptic number.

13728415 is a deficient number, since it is larger than the sum of its proper divisors (3184385).

13728415 is a wasteful number, since it uses less digits than its factorization.

13728415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506.

The product of its digits is 6720, while the sum is 31.

The square root of 13728415 is about 3705.1875795970. The cubic root of 13728415 is about 239.4455662311.

The spelling of 13728415 in words is "thirteen million, seven hundred twenty-eight thousand, four hundred fifteen".