1312963856 has 20 divisors (see below), whose sum is σ = 2693507292. Its totient is φ = 617865216.

The previous prime is 1312963831. The next prime is 1312963889. The reversal of 1312963856 is 6583692131.

It can be written as a sum of positive squares in 2 ways, for example, as 478909456 + 834054400 = 21884^2 + 28880^2 .

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, 2413265 + ... + 2413808.

Almost surely, 2^1312963856 is an apocalyptic number.

1312963856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1312963856 is an abundant number, since it is smaller than the sum of its proper divisors (1380543436).

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

1312963856 is a wasteful number, since it uses less digits than its factorization.

1312963856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4827098 (or 4827092 counting only the distinct ones).

The product of its digits is 233280, while the sum is 44.

The square root of 1312963856 is about 36234.8431209520. The cubic root of 1312963856 is about 1095.0087517631.

The spelling of 1312963856 in words is "one billion, three hundred twelve million, nine hundred sixty-three thousand, eight hundred fifty-six".