1311808672 has 24 divisors (see below), whose sum is σ = 2734543476. Its totient is φ = 617321472.

The previous prime is 1311808669. The next prime is 1311808691. The reversal of 1311808672 is 2768081131.

It can be written as a sum of positive squares in 2 ways, for example, as 1292833936 + 18974736 = 35956^2 + 4356^2 .

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, 1205163 + ... + 1206250.

Almost surely, 2^1311808672 is an apocalyptic number.

It is an amenable number.

1311808672 is an abundant number, since it is smaller than the sum of its proper divisors (1422734804).

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

1311808672 is a wasteful number, since it uses less digits than its factorization.

1311808672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411440 (or 2411432 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1311808672 is about 36218.8993758783. The cubic root of 1311808672 is about 1094.6875172926.

The spelling of 1311808672 in words is "one billion, three hundred eleven million, eight hundred eight thousand, six hundred seventy-two".