688844 has 18 divisors (see below), whose sum is σ = 1306620. Its totient is φ = 317616.

The previous prime is 688813. The next prime is 688861. The reversal of 688844 is 448886.

It is a junction number, because it is equal to n+sod(n) for n = 688798 and 688807.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 167 + ... + 1185.

It is an arithmetic number, because the mean of its divisors is an integer number (72590).

2⁶⁸⁸⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

688844 is a deficient number, since it is larger than the sum of its proper divisors (617776).

688844 is a wasteful number, since it uses less digits than its factorization.

688844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049 (or 1034 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The square root of 688844 is about 829.9662643746. The cubic root of 688844 is about 88.3161835303.

The spelling of 688844 in words is "six hundred eighty-eight thousand, eight hundred forty-four".