1312311996 has 48 divisors (see below), whose sum is σ = 3404261280. Its totient is φ = 437184000.

The previous prime is 1312311983. The next prime is 1312312033. The reversal of 1312311996 is 6991132131.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1312311996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325996 + ... + 329996.

It is an arithmetic number, because the mean of its divisors is an integer number (70922110).

Almost surely, 2^1312311996 is an apocalyptic number.

It is an amenable number.

1312311996 is an abundant number, since it is smaller than the sum of its proper divisors (2091949284).

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

1312311996 is a wasteful number, since it uses less digits than its factorization.

1312311996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7051 (or 7043 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 1312311996 is about 36225.8470708416. The cubic root of 1312311996 is about 1094.8275051985.

The spelling of 1312311996 in words is "one billion, three hundred twelve million, three hundred eleven thousand, nine hundred ninety-six".