686486408 has 16 divisors (see below), whose sum is σ = 1288561500. Its totient is φ = 342870016.

The previous prime is 686486377. The next prime is 686486453. The reversal of 686486408 is 804684686.

686486408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 639179524 + 47306884 = 25282^2 + 6878^2 .

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, 38753 + ... + 53616.

Almost surely, 2^686486408 is an apocalyptic number.

It is an amenable number.

686486408 is a deficient number, since it is larger than the sum of its proper divisors (602075092).

686486408 is a wasteful number, since it uses less digits than its factorization.

686486408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93304 (or 93300 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 50.

The square root of 686486408 is about 26200.8856338865. The cubic root of 686486408 is about 882.1531331888.

The spelling of 686486408 in words is "six hundred eighty-six million, four hundred eighty-six thousand, four hundred eight".