The solution showed another feature - this number is also poly-divisible, I.e. as a nine digit number it is divisible by nine, erase the last digit It becomes divisible by 8,…and so on.

There many features connected with our number, but the most important , which I ask you to

**PROVE:
381654729 is a Friedman number **

Definition and examples
@ OEIS A036057

REM: proving does not mean to find somewhere the answer, but to solve it.