1391294768 has 10 divisors (see below), whose sum is σ = 2695633644. Its totient is φ = 695647376.

The previous prime is 1391294743. The next prime is 1391294783. The reversal of 1391294768 is 8674921931.

It is a super-2 number, since 2×1391294768² = 3871402262928347648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43477946 + ... + 43477977.

Almost surely, 2^1391294768 is an apocalyptic number.

It is an amenable number.

1391294768 is a deficient number, since it is larger than the sum of its proper divisors (1304338876).

1391294768 is an equidigital number, since it uses as much as digits as its factorization.

1391294768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86955931 (or 86955925 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 1391294768 is about 37300.0639141544. The cubic root of 1391294768 is about 1116.3654417428.

The spelling of 1391294768 in words is "one billion, three hundred ninety-one million, two hundred ninety-four thousand, seven hundred sixty-eight".