12220326 has 12 divisors (see below), whose sum is σ = 26477412. Its totient is φ = 4073436.

The previous prime is 12220301. The next prime is 12220333. The reversal of 12220326 is 62302221.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 678907 = 12220326 / (1 + 2 + 2 + 2 + 0 + 3 + 2 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 12220299 and 12220308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339436 + ... + 339471.

It is an arithmetic number, because the mean of its divisors is an integer number (2206451).

Almost surely, 2^12220326 is an apocalyptic number.

12220326 is an abundant number, since it is smaller than the sum of its proper divisors (14257086).

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

12220326 is a wasteful number, since it uses less digits than its factorization.

12220326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678915 (or 678912 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 12220326 is about 3495.7582868385. The cubic root of 12220326 is about 230.3355279315.

Adding to 12220326 its reverse (62302221), we get a palindrome (74522547).

The spelling of 12220326 in words is "twelve million, two hundred twenty thousand, three hundred twenty-six".