1320431312 has 20 divisors (see below), whose sum is σ = 2560257636. Its totient is φ = 659719680.

The previous prime is 1320431303. The next prime is 1320431339. The reversal of 1320431312 is 2131340231.

It can be written as a sum of positive squares in 2 ways, for example, as 877581376 + 442849936 = 29624^2 + 21044^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8543 + ... + 52094.

Almost surely, 2^1320431312 is an apocalyptic number.

It is an amenable number.

1320431312 is a deficient number, since it is larger than the sum of its proper divisors (1239826324).

1320431312 is a wasteful number, since it uses less digits than its factorization.

1320431312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62006 (or 62000 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1320431312 is about 36337.7395004147. The cubic root of 1320431312 is about 1097.0807753991.

Adding to 1320431312 its reverse (2131340231), we get a palindrome (3451771543).

The spelling of 1320431312 in words is "one billion, three hundred twenty million, four hundred thirty-one thousand, three hundred twelve".