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<!DOCTYPE html>
<html lang=en>
<head>
  <meta charset=utf-8>
  <title>Strong number check</title>
</head>
<body>
  <h1>Strong number check</h1>
  <pre id=out></pre>
  <script>!function(){var t=[];t.push("Input: 145"),t.push(function(t){for(var n=[1,1,2,6,24,120,720,5040,40320,362880],o=t,r=0;t>0;){r+=n[t%10],t=Math.floor(t/10)}return r===o}(145)?"145 is a Strong Number.":"145 is not a Strong Number."),document.getElementById("out").textContent=t.join("\n")}()</script>
</body>
</html>

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JavaScript Strong Number — Single Check (Try It)