13728885 has 8 divisors (see below), whose sum is σ = 21966240. Its totient is φ = 7322064.

The previous prime is 13728881. The next prime is 13728893. The reversal of 13728885 is 58882731.

It is a happy number.

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

It is not a de Polignac number, because 13728885 - 2² = 13728881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13728881) 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, 457615 + ... + 457644.

It is an arithmetic number, because the mean of its divisors is an integer number (2745780).

Almost surely, 2^13728885 is an apocalyptic number.

13728885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13728885 is a deficient number, since it is larger than the sum of its proper divisors (8237355).

13728885 is an equidigital number, since it uses as much as digits as its factorization.

13728885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915267.

The product of its digits is 107520, while the sum is 42.

The square root of 13728885 is about 3705.2510036433. The cubic root of 13728885 is about 239.4482987177.

The spelling of 13728885 in words is "thirteen million, seven hundred twenty-eight thousand, eight hundred eighty-five".