Harshad is a number that is divisible by the sum of its' digits. Two examples of these are 162 and 420.
This is a short multi. There is no container at the listed coordinates. This is just a starting point. To double check that you are in the correct starting spot. Stand at the intersecting point of where the crooked arrow points and the line of communication. From here head 420 feet, bearing 162 degrees. Good Luck.