1320243144 has 128 divisors (see below), whose sum is σ = 3698110080. Its totient is φ = 389376000.

The previous prime is 1320243143. The next prime is 1320243149. The reversal of 1320243144 is 4413420231.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1320243143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2196444 + ... + 2197044.

It is an arithmetic number, because the mean of its divisors is an integer number (28891485).

Almost surely, 2^1320243144 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 1320243144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849055040).

1320243144 is an abundant number, since it is smaller than the sum of its proper divisors (2377866936).

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

1320243144 is a wasteful number, since it uses less digits than its factorization.

1320243144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 827 counting only the distinct ones).

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

The square root of 1320243144 is about 36335.1502542648. The cubic root of 1320243144 is about 1097.0286597759.

Adding to 1320243144 its reverse (4413420231), we get a palindrome (5733663375).

The spelling of 1320243144 in words is "one billion, three hundred twenty million, two hundred forty-three thousand, one hundred forty-four".