Step 1: Divide the number into separate digits:
90281 => 9 0 2 8 1
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
9 to 0 = 9
0 to 2 = 2
2 to 8 = 6
8 to 1 = 7
1 to 9 = 8
Step 3: Combine the filters to a string:
9 2 6 7 8 = 92678