1244313020 has 12 divisors (see below), whose sum is σ = 2613057384. Its totient is φ = 497725200.

The previous prime is 1244313013. The next prime is 1244313023. The reversal of 1244313020 is 203134421.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 62215651 = 1244313020 / (1 + 2 + 4 + 4 + 3 + 1 + 3 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1244312983 and 1244313001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244313023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31107806 + ... + 31107845.

It is an arithmetic number, because the mean of its divisors is an integer number (217754782).

Almost surely, 2^1244313020 is an apocalyptic number.

1244313020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244313020 is an abundant number, since it is smaller than the sum of its proper divisors (1368744364).

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

1244313020 is a wasteful number, since it uses less digits than its factorization.

1244313020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62215660 (or 62215658 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1244313020 is about 35274.8213319359. The cubic root of 1244313020 is about 1075.5812310232.

Adding to 1244313020 its reverse (203134421), we get a palindrome (1447447441).

The spelling of 1244313020 in words is "one billion, two hundred forty-four million, three hundred thirteen thousand, twenty".