1320401144 has 16 divisors (see below), whose sum is σ = 2476533120. Its totient is φ = 659992320.

The previous prime is 1320401141. The next prime is 1320401177. The reversal of 1320401144 is 4411040231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320401141) 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, 2792 + ... + 51464.

It is an arithmetic number, because the mean of its divisors is an integer number (154783320).

Almost surely, 2^1320401144 is an apocalyptic number.

It is an amenable number.

1320401144 is a deficient number, since it is larger than the sum of its proper divisors (1156131976).

1320401144 is a wasteful number, since it uses less digits than its factorization.

1320401144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52070 (or 52066 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1320401144 is about 36337.3243924205. The cubic root of 1320401144 is about 1097.0724203047.

Adding to 1320401144 its reverse (4411040231), we get a palindrome (5731441375).

The spelling of 1320401144 in words is "one billion, three hundred twenty million, four hundred one thousand, one hundred forty-four".