688912 has 20 divisors (see below), whose sum is σ = 1525696. Its totient is φ = 295200.

The previous prime is 688907. The next prime is 688939. The reversal of 688912 is 219886.

It is a nialpdrome in base 16.

It is an unprimeable number.

688912 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2964 + ... + 3187.

2⁶⁸⁸⁹¹² is an apocalyptic number.

It is an amenable number.

688912 is an abundant number, since it is smaller than the sum of its proper divisors (836784).

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

688912 is a wasteful number, since it uses less digits than its factorization.

688912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6166 (or 6160 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 688912 is about 830.0072288842. The cubic root of 688912 is about 88.3190895114.

It can be divided in two parts, 688 and 912, that added together give a square (1600 = 40²).

The spelling of 688912 in words is "six hundred eighty-eight thousand, nine hundred twelve".