Step 1: Divide the number into separate digits:
22898 => 2 2 8 9 8
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
2 to 2 = 0
2 to 8 = 6
8 to 9 = 1
9 to 8 = 1
8 to 2 = 6
Step 3: Combine the filters to a string:
0 6 1 1 6 = 06116