1224263220 has 24 divisors (see below), whose sum is σ = 3427937184. Its totient is φ = 326470176.

The previous prime is 1224263219. The next prime is 1224263231. The reversal of 1224263220 is 223624221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10202134 + ... + 10202253.

It is an arithmetic number, because the mean of its divisors is an integer number (142830716).

Almost surely, 2^1224263220 is an apocalyptic number.

1224263220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224263220 is an abundant number, since it is smaller than the sum of its proper divisors (2203673964).

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

1224263220 is a wasteful number, since it uses less digits than its factorization.

1224263220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20404399 (or 20404397 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1224263220 is about 34989.4729883146. The cubic root of 1224263220 is about 1069.7729217951.

Adding to 1224263220 its reverse (223624221), we get a palindrome (1447887441).

The spelling of 1224263220 in words is "one billion, two hundred twenty-four million, two hundred sixty-three thousand, two hundred twenty".