688854 has 8 divisors (see below), whose sum is σ = 1377720. Its totient is φ = 229616.

The previous prime is 688813. The next prime is 688861. The reversal of 688854 is 458886.

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

688854 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 688854.

It is an unprimeable number.

688854 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, 57399 + ... + 57410.

It is an arithmetic number, because the mean of its divisors is an integer number (172215).

2⁶⁸⁸⁸⁵⁴ is an apocalyptic number.

688854 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

688854 is a wasteful number, since it uses less digits than its factorization.

688854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114814.

The product of its digits is 61440, while the sum is 39.

The square root of 688854 is about 829.9722886940. The cubic root of 688854 is about 88.3166108925.

The spelling of 688854 in words is "six hundred eighty-eight thousand, eight hundred fifty-four".