1311662868 has 48 divisors (see below), whose sum is σ = 3146060736. Its totient is φ = 425152000.

The previous prime is 1311662843. The next prime is 1311662879. The reversal of 1311662868 is 8682661131.

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, 62743 + ... + 80993.

It is an arithmetic number, because the mean of its divisors is an integer number (65542932).

Almost surely, 2^1311662868 is an apocalyptic number.

It is an amenable number.

1311662868 is an abundant number, since it is smaller than the sum of its proper divisors (1834397868).

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

1311662868 is a wasteful number, since it uses less digits than its factorization.

1311662868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18424 (or 18422 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1311662868 is about 36216.8865033978. The cubic root of 1311662868 is about 1094.6469586004.

The spelling of 1311662868 in words is "one billion, three hundred eleven million, six hundred sixty-two thousand, eight hundred sixty-eight".