12218346 has 48 divisors (see below), whose sum is σ = 30888000. Its totient is φ = 3489192.

The previous prime is 12218333. The next prime is 12218363. The reversal of 12218346 is 64381221.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5185 + ... + 7163.

It is an arithmetic number, because the mean of its divisors is an integer number (643500).

Almost surely, 2^12218346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12218346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15444000).

12218346 is an abundant number, since it is smaller than the sum of its proper divisors (18669654).

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

12218346 is a wasteful number, since it uses less digits than its factorization.

12218346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008 (or 1991 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 12218346 is about 3495.4750750077. The cubic root of 12218346 is about 230.3230872110.

Adding to 12218346 its reverse (64381221), we get a palindrome (76599567).

The spelling of 12218346 in words is "twelve million, two hundred eighteen thousand, three hundred forty-six".