12438209 has 8 divisors (see below), whose sum is σ = 14505600. Its totient is φ = 10661028.

The previous prime is 12438197. The next prime is 12438227. The reversal of 12438209 is 90283421.

12438209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12438209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12438269) 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 7 ways as a sum of consecutive naturals, for example, 17789 + ... + 18474.

It is an arithmetic number, because the mean of its divisors is an integer number (1813200).

Almost surely, 2^12438209 is an apocalyptic number.

It is an amenable number.

12438209 is a deficient number, since it is larger than the sum of its proper divisors (2067391).

12438209 is an frugal number, since it uses more digits than its factorization.

12438209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36284 (or 36270 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 12438209 is about 3526.7845128389. The cubic root of 12438209 is about 231.6963986017.

The spelling of 12438209 in words is "twelve million, four hundred thirty-eight thousand, two hundred nine".