Step 1: Divide the number into separate digits:
08460 => 0 8 4 6 0
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
0 to 8 = 8
8 to 4 = 4
4 to 6 = 2
6 to 0 = 6
0 to 0 = 0
Step 3: Combine the filters to a string:
8 4 2 6 0 = 84260