1317944872 has 16 divisors (see below), whose sum is σ = 2475322740. Its totient is φ = 657858816.

The previous prime is 1317944869. The next prime is 1317944879. The reversal of 1317944872 is 2784497131.

It can be written as a sum of positive squares in 2 ways, for example, as 1193978916 + 123965956 = 34554^2 + 11134^2 .

It is not an unprimeable number, because it can be changed into a prime (1317944879) 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, 134163 + ... + 143650.

Almost surely, 2^1317944872 is an apocalyptic number.

It is an amenable number.

1317944872 is a deficient number, since it is larger than the sum of its proper divisors (1157377868).

1317944872 is a wasteful number, since it uses less digits than its factorization.

1317944872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278412 (or 278408 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 1317944872 is about 36303.5104638656. The cubic root of 1317944872 is about 1096.3917228893.

The spelling of 1317944872 in words is "one billion, three hundred seventeen million, nine hundred forty-four thousand, eight hundred seventy-two".