13728218 has 8 divisors (see below), whose sum is σ = 23534112. Its totient is φ = 5883516.

The previous prime is 13728193. The next prime is 13728229. The reversal of 13728218 is 81282731.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490280 + ... + 490307.

It is an arithmetic number, because the mean of its divisors is an integer number (2941764).

Almost surely, 2^13728218 is an apocalyptic number.

13728218 is a deficient number, since it is larger than the sum of its proper divisors (9805894).

13728218 is an equidigital number, since it uses as much as digits as its factorization.

13728218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980596.

The product of its digits is 5376, while the sum is 32.

The square root of 13728218 is about 3705.1609951526. The cubic root of 13728218 is about 239.4444208937. Note that the first 4 decimals are identical.

The spelling of 13728218 in words is "thirteen million, seven hundred twenty-eight thousand, two hundred eighteen".