688630768 has 20 divisors (see below), whose sum is σ = 1524825520. Its totient is φ = 295127424.

The previous prime is 688630763. The next prime is 688630841. The reversal of 688630768 is 867036886.

688630768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688630763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3074133 + ... + 3074356.

It is an arithmetic number, because the mean of its divisors is an integer number (76241276).

Almost surely, 2^688630768 is an apocalyptic number.

It is an amenable number.

688630768 is an abundant number, since it is smaller than the sum of its proper divisors (836194752).

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

688630768 is a wasteful number, since it uses less digits than its factorization.

688630768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6148504 (or 6148498 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The square root of 688630768 is about 26241.7752448267. The cubic root of 688630768 is about 883.0706981713.

The spelling of 688630768 in words is "six hundred eighty-eight million, six hundred thirty thousand, seven hundred sixty-eight".