688018 has 8 divisors (see below), whose sum is σ = 1035648. Its totient is φ = 342804.

The previous prime is 688013. The next prime is 688027. The reversal of 688018 is 810886.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555 + ... + 1297.

It is an arithmetic number, because the mean of its divisors is an integer number (129456).

2⁶⁸⁸⁰¹⁸ is an apocalyptic number.

688018 is a deficient number, since it is larger than the sum of its proper divisors (347630).

688018 is a wasteful number, since it uses less digits than its factorization.

688018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 688018 is about 829.4685045256. The cubic root of 688018 is about 88.2808691267.

The spelling of 688018 in words is "six hundred eighty-eight thousand, eighteen".