12218394 has 16 divisors (see below), whose sum is σ = 24498432. Its totient is φ = 4062528.

The previous prime is 12218363. The next prime is 12218417. The reversal of 12218394 is 49381221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247 + ... + 4949.

It is an arithmetic number, because the mean of its divisors is an integer number (1531152).

Almost surely, 2^12218394 is an apocalyptic number.

12218394 is an abundant number, since it is smaller than the sum of its proper divisors (12280038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12218394 is a wasteful number, since it uses less digits than its factorization.

12218394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141.

The product of its digits is 3456, while the sum is 30.

The square root of 12218394 is about 3495.4819410204. The cubic root of 12218394 is about 230.3233888201.

The spelling of 12218394 in words is "twelve million, two hundred eighteen thousand, three hundred ninety-four".