12218622 has 32 divisors (see below), whose sum is σ = 26936448. Its totient is φ = 3671136.

The previous prime is 12218617. The next prime is 12218623. The reversal of 12218622 is 22681221.

It is a super-3 number, since 3×12218622³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12218592 and 12218601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1533 + ... + 5175.

It is an arithmetic number, because the mean of its divisors is an integer number (841764).

Almost surely, 2^12218622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12218622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13468224).

12218622 is an abundant number, since it is smaller than the sum of its proper divisors (14717826).

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

12218622 is a wasteful number, since it uses less digits than its factorization.

12218622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3704.

The product of its digits is 768, while the sum is 24.

The square root of 12218622 is about 3495.5145543968. The cubic root of 12218622 is about 230.3248214526.

Adding to 12218622 its reverse (22681221), we get a palindrome (34899843).

The spelling of 12218622 in words is "twelve million, two hundred eighteen thousand, six hundred twenty-two".