12218338 has 24 divisors (see below), whose sum is σ = 20851740. Its totient is φ = 5359200.

The previous prime is 12218333. The next prime is 12218363. The reversal of 12218338 is 83381221.

It can be written as a sum of positive squares in 2 ways, for example, as 10673289 + 1545049 = 3267^2 + 1243^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (12218333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6148 + ... + 7888.

Almost surely, 2^12218338 is an apocalyptic number.

12218338 is a deficient number, since it is larger than the sum of its proper divisors (8633402).

12218338 is a wasteful number, since it uses less digits than its factorization.

12218338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794 (or 1783 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 12218338 is about 3495.4739306709. The cubic root of 12218338 is about 230.3230369427.

Adding to 12218338 its reverse (83381221), we get a palindrome (95599559).

It can be divided in two parts, 122183 and 38, that added together give a palindrome (122221).

The spelling of 12218338 in words is "twelve million, two hundred eighteen thousand, three hundred thirty-eight".