1224224220 has 96 divisors (see below), whose sum is σ = 3585254400. Its totient is φ = 311534080.

The previous prime is 1224224171. The next prime is 1224224231. The reversal of 1224224220 is 224224221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 825880 + ... + 827360.

It is an arithmetic number, because the mean of its divisors is an integer number (37346400).

Almost surely, 2^1224224220 is an apocalyptic number.

1224224220 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 1224224220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792627200).

1224224220 is an abundant number, since it is smaller than the sum of its proper divisors (2361030180).

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

1224224220 is a wasteful number, since it uses less digits than its factorization.

1224224220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 1224224220 is about 34988.9156733958. The cubic root of 1224224220 is about 1069.7615621500.

Adding to 1224224220 its reverse (224224221), we get a palindrome (1448448441).

Subtracting from 1224224220 its reverse (224224221), we obtain a palindrome (999999999).

The spelling of 1224224220 in words is "one billion, two hundred twenty-four million, two hundred twenty-four thousand, two hundred twenty".