1312881792 has 32 divisors (see below), whose sum is σ = 3487343280. Its totient is φ = 437627136.

The previous prime is 1312881769. The next prime is 1312881793. The reversal of 1312881792 is 2971882131.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1312881793) 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, 1709098 + ... + 1709865.

Almost surely, 2^1312881792 is an apocalyptic number.

1312881792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312881792 is an abundant number, since it is smaller than the sum of its proper divisors (2174461488).

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

1312881792 is an equidigital number, since it uses as much as digits as its factorization.

1312881792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418980 (or 3418968 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The square root of 1312881792 is about 36233.7107125395. The cubic root of 1312881792 is about 1094.9859375605.

The spelling of 1312881792 in words is "one billion, three hundred twelve million, eight hundred eighty-one thousand, seven hundred ninety-two".