1244303220 has 144 divisors (see below), whose sum is σ = 3678998400. Its totient is φ = 314189568.

The previous prime is 1244303213. The next prime is 1244303227. The reversal of 1244303220 is 223034421.

It is an interprime number because it is at equal distance from previous prime (1244303213) and next prime (1244303227).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244303227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6252681 + ... + 6252879.

It is an arithmetic number, because the mean of its divisors is an integer number (25548600).

Almost surely, 2^1244303220 is an apocalyptic number.

1244303220 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 1244303220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1839499200).

1244303220 is an abundant number, since it is smaller than the sum of its proper divisors (2434695180).

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

1244303220 is a wasteful number, since it uses less digits than its factorization.

1244303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1244303220 is about 35274.6824223833. The cubic root of 1244303220 is about 1075.5784073168.

Adding to 1244303220 its reverse (223034421), we get a palindrome (1467337641).

The spelling of 1244303220 in words is "one billion, two hundred forty-four million, three hundred three thousand, two hundred twenty".