688588 has 6 divisors (see below), whose sum is σ = 1205036. Its totient is φ = 344292.

The previous prime is 688573. The next prime is 688591. The reversal of 688588 is 885886.

It is an unprimeable number.

688588 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 as a sum of consecutive naturals, namely, 86070 + ... + 86077.

2⁶⁸⁸⁵⁸⁸ is an apocalyptic number.

It is an amenable number.

688588 is a deficient number, since it is larger than the sum of its proper divisors (516448).

688588 is a wasteful number, since it uses less digits than its factorization.

688588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172151 (or 172149 counting only the distinct ones).

The product of its digits is 122880, while the sum is 43.

The square root of 688588 is about 829.8120269073. The cubic root of 688588 is about 88.3052416507.

The spelling of 688588 in words is "six hundred eighty-eight thousand, five hundred eighty-eight".