This is in the spirit of the What is a Word/Phrase™ series started by JLee with Number version puzzles.
If a number conforms to a special rule, I call it a Finale Number™.
Use the following examples below to find the rule.
$$ % set Title text. (spaces around the text ARE important; do not remove.) % increase Pad value only if your entries are longer than the title bar. % \def\Pad{\P{0.0}} \def\Title{\textbf{ Finale }} % \def\S#1#2{\Space{#1}{20px}{#2px}}\def\P#1{\V{#1em}}\def\V#1{\S{#1}{9}} \def\T{\Title\textbf{Numbers}^{\;\!™}\Pad}\def\NT{\Pad\textbf{Not}\T\ }\displaystyle \smash{\lower{29px}\bbox[yellow]{\phantom{\rlap{rubio.2019.05.15}\S{6px}{0} \begin{array}{cc}\Pad\T&\NT\\\end{array}}}}\atop\def\V#1{\S{#1}{5}} \begin{array}{|c|c|}\hline\Pad\T&\NT\\\hline % \text{ 28 }&\text{ 30 }\\ \hline \text{ 55 }&\text{ 53 }\\ \hline \text{ 388 }&\text{ 776 }\\ \hline \text{ 514 }&\text{ 207 }\\ \hline \text{ 982 }&\text{ 984 }\\ \hline \text{ 1,765 }&\text{ 1,763 }\\ \hline \text{ 4,978 }&\text{ 9,956 }\\ \hline \text{ 6,040 }&\text{ 3,020 }\\ \hline \text{ 8,110 }&\text{ 8,112 }\\ \hline \text{ 19,999 }&\text{ 19,997 }\\ \hline \end{array}$$
And, if you want to analyze, here is a CSV version:
Finale Numbers™,Not Finale Numbers™
28,30
55,53
388,776
514,207
982,984
1765,1763
4978,9956
6040,3020
8110,8112
19999,19997