688318 has 8 divisors (see below), whose sum is σ = 1038312. Its totient is φ = 342216.

The previous prime is 688309. The next prime is 688333. The reversal of 688318 is 813886.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480 + ... + 1267.

It is an arithmetic number, because the mean of its divisors is an integer number (129789).

2⁶⁸⁸³¹⁸ is an apocalyptic number.

688318 is a deficient number, since it is larger than the sum of its proper divisors (349994).

688318 is a wasteful number, since it uses less digits than its factorization.

688318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946.

The product of its digits is 9216, while the sum is 34.

The square root of 688318 is about 829.6493235096. The cubic root of 688318 is about 88.2936984482.

The spelling of 688318 in words is "six hundred eighty-eight thousand, three hundred eighteen".