1320143344 has 80 divisors (see below), whose sum is σ = 2861955712. Its totient is φ = 585978624.

The previous prime is 1320143317. The next prime is 1320143359. The reversal of 1320143344 is 4433410231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598147 + ... + 600349.

Almost surely, 2^1320143344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320143344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1430977856).

1320143344 is an abundant number, since it is smaller than the sum of its proper divisors (1541812368).

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

1320143344 is a wasteful number, since it uses less digits than its factorization.

1320143344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2328 counting only the distinct ones).

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

The square root of 1320143344 is about 36333.7769024912. The cubic root of 1320143344 is about 1097.0010168326.

Adding to 1320143344 its reverse (4433410231), we get a palindrome (5753553575).

The spelling of 1320143344 in words is "one billion, three hundred twenty million, one hundred forty-three thousand, three hundred forty-four".