1320431284 has 12 divisors (see below), whose sum is σ = 2373207844. Its totient is φ = 642371904.

The previous prime is 1320431251. The next prime is 1320431291. The reversal of 1320431284 is 4821340231.

It can be written as a sum of positive squares in 2 ways, for example, as 996791184 + 323640100 = 31572^2 + 17990^2 .

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, 4460769 + ... + 4461064.

Almost surely, 2^1320431284 is an apocalyptic number.

It is an amenable number.

1320431284 is a deficient number, since it is larger than the sum of its proper divisors (1052776560).

1320431284 is a wasteful number, since it uses less digits than its factorization.

1320431284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8921874 (or 8921872 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1320431284 is about 36337.7391151403. The cubic root of 1320431284 is about 1097.0807676445.

The spelling of 1320431284 in words is "one billion, three hundred twenty million, four hundred thirty-one thousand, two hundred eighty-four".