1222436320 has 144 divisors (see below), whose sum is σ = 3442361328. Its totient is φ = 408791040.

The previous prime is 1222436309. The next prime is 1222436321. The reversal of 1222436320 is 236342221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222436321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319539 + ... + 323341.

It is an arithmetic number, because the mean of its divisors is an integer number (23905287).

Almost surely, 2^1222436320 is an apocalyptic number.

1222436320 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 1222436320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1721180664).

1222436320 is an abundant number, since it is smaller than the sum of its proper divisors (2219925008).

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

1222436320 is a wasteful number, since it uses less digits than its factorization.

1222436320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873 (or 3858 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1222436320 is about 34963.3568182462. The cubic root of 1222436320 is about 1069.2405359875.

Adding to 1222436320 its reverse (236342221), we get a palindrome (1458778541).

The spelling of 1222436320 in words is "one billion, two hundred twenty-two million, four hundred thirty-six thousand, three hundred twenty".