12224220 has 48 divisors (see below), whose sum is σ = 36032640. Its totient is φ = 3087936.

The previous prime is 12224213. The next prime is 12224221. The reversal of 12224220 is 2242221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12224220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12224221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4222 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (750680).

Almost surely, 2^12224220 is an apocalyptic number.

12224220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12224220 is an abundant number, since it is smaller than the sum of its proper divisors (23808420).

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

12224220 is a wasteful number, since it uses less digits than its factorization.

12224220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10754 (or 10752 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 12224220 is about 3496.3152031818. The cubic root of 12224220 is about 230.3599907620.

Adding to 12224220 its reverse (2242221), we get a palindrome (14466441).

It can be divided in two parts, 122 and 24220, that added together give a palindrome (24342).

The spelling of 12224220 in words is "twelve million, two hundred twenty-four thousand, two hundred twenty".