1391717868 has 24 divisors (see below), whose sum is σ = 3250426368. Its totient is φ = 463465296.

The previous prime is 1391717837. The next prime is 1391717891. The reversal of 1391717868 is 8687171931.

It is a super-2 number, since 2×1391717868² = 3873757248220930848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1391717868.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41796 + ... + 67307.

It is an arithmetic number, because the mean of its divisors is an integer number (135434432).

Almost surely, 2^1391717868 is an apocalyptic number.

It is an amenable number.

1391717868 is an abundant number, since it is smaller than the sum of its proper divisors (1858708500).

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

1391717868 is a wasteful number, since it uses less digits than its factorization.

1391717868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110173 (or 110171 counting only the distinct ones).

The product of its digits is 508032, while the sum is 51.

The square root of 1391717868 is about 37305.7350550823. The cubic root of 1391717868 is about 1116.4785944591.

The spelling of 1391717868 in words is "one billion, three hundred ninety-one million, seven hundred seventeen thousand, eight hundred sixty-eight".