688930680 has 32 divisors (see below), whose sum is σ = 2066792400. Its totient is φ = 183714816.

The previous prime is 688930673. The next prime is 688930681. The reversal of 688930680 is 86039886.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688930681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2870425 + ... + 2870664.

Almost surely, 2^688930680 is an apocalyptic number.

688930680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

688930680 is an abundant number, since it is smaller than the sum of its proper divisors (1377861720).

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

688930680 is a wasteful number, since it uses less digits than its factorization.

688930680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741103 (or 5741099 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 688930680 is about 26247.4890227618. The cubic root of 688930680 is about 883.1988776799.

The spelling of 688930680 in words is "six hundred eighty-eight million, nine hundred thirty thousand, six hundred eighty".