688606808 has 16 divisors (see below), whose sum is σ = 1322629560. Its totient is φ = 335905600.

The previous prime is 688606801. The next prime is 688606817. The reversal of 688606808 is 808606886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688606801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049378 + ... + 1050033.

Almost surely, 2^688606808 is an apocalyptic number.

It is an amenable number.

688606808 is a deficient number, since it is larger than the sum of its proper divisors (634022752).

688606808 is a wasteful number, since it uses less digits than its factorization.

688606808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099458 (or 2099454 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The square root of 688606808 is about 26241.3187168633. The cubic root of 688606808 is about 883.0604562921.

The spelling of 688606808 in words is "six hundred eighty-eight million, six hundred six thousand, eight hundred eight".