Perfect Digit-to-Digit Invariant/Examples/438,579,088

Example of Perfect Digit-to-Digit Invariant
$438 \, 579 \, 088$ is a perfect digit-to-digit invariant:
 * $438 \, 579 \, 088 = 4^4 + 3^3 + 8^8 + 5^5 + 7^7 + 9^9 + 0^0 + 8^8 + 8^8$