1368817808 has 20 divisors (see below), whose sum is σ = 2658005100. Its totient is φ = 682881024.

The previous prime is 1368817799. The next prime is 1368817829. The reversal of 1368817808 is 8087188631.

It can be written as a sum of positive squares in 2 ways, for example, as 1175941264 + 192876544 = 34292^2 + 13888^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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, 88085 + ... + 102452.

It is an arithmetic number, because the mean of its divisors is an integer number (132900255).

Almost surely, 2^1368817808 is an apocalyptic number.

It is an amenable number.

1368817808 is a deficient number, since it is larger than the sum of its proper divisors (1289187292).

1368817808 is a wasteful number, since it uses less digits than its factorization.

1368817808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190994 (or 190988 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 1368817808 is about 36997.5378640255. The cubic root of 1368817808 is about 1110.3209871677.

The spelling of 1368817808 in words is "one billion, three hundred sixty-eight million, eight hundred seventeen thousand, eight hundred eight".