1224443220 has 768 divisors, whose sum is σ = 5148057600. Its totient is φ = 209018880.

The previous prime is 1224443197. The next prime is 1224443237. The reversal of 1224443220 is 223444221.

It is a super-2 number, since 2×1224443220² = 2998522398007936800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 33093042 + ... + 33093078.

It is an arithmetic number, because the mean of its divisors is an integer number (6703200).

Almost surely, 2^1224443220 is an apocalyptic number.

1224443220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224443220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2574028800).

1224443220 is an abundant number, since it is smaller than the sum of its proper divisors (3923614380).

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

1224443220 is a wasteful number, since it uses less digits than its factorization.

1224443220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1224443220 is about 34992.0450959929. The cubic root of 1224443220 is about 1069.8253478002.

Adding to 1224443220 its reverse (223444221), we get a palindrome (1447887441).

It can be divided in two parts, 1224 and 443220, that added together give a palindrome (444444).

The spelling of 1224443220 in words is "one billion, two hundred twenty-four million, four hundred forty-three thousand, two hundred twenty".