688118 has 8 divisors (see below), whose sum is σ = 1043112. Its totient is φ = 340416.

The previous prime is 688111. The next prime is 688133. The reversal of 688118 is 811886.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688111) by changing a digit.

688118 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, 1580 + ... + 1967.

It is an arithmetic number, because the mean of its divisors is an integer number (130389).

2⁶⁸⁸¹¹⁸ is an apocalyptic number.

688118 is a deficient number, since it is larger than the sum of its proper divisors (354994).

688118 is a wasteful number, since it uses less digits than its factorization.

688118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646.

The product of its digits is 3072, while the sum is 32.

The square root of 688118 is about 829.5287818997. The cubic root of 688118 is about 88.2851459815.

The spelling of 688118 in words is "six hundred eighty-eight thousand, one hundred eighteen".