688867768 has 16 divisors (see below), whose sum is σ = 1293723000. Its totient is φ = 343874976.

The previous prime is 688867757. The next prime is 688867787. The reversal of 688867768 is 867768886.

It is a congruent number.

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, 64603 + ... + 74506.

Almost surely, 2^688867768 is an apocalyptic number.

It is an amenable number.

688867768 is a deficient number, since it is larger than the sum of its proper divisors (604855232).

688867768 is a wasteful number, since it uses less digits than its factorization.

688867768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139734 (or 139730 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 64.

The square root of 688867768 is about 26246.2905569530. The cubic root of 688867768 is about 883.1719927789.

The spelling of 688867768 in words is "six hundred eighty-eight million, eight hundred sixty-seven thousand, seven hundred sixty-eight".