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function armstrongNumber(number) {
if (number < 0 || number == null || number == undefined) {
return false;
}
const ndigits = number.toString().length;
let sum = 0;
for (let i = 0; i < ndigits; i++) {
sum = sum + number.toString()[i] ** ndigits;
}
return sum === number;
}
module.exports = {
armstrongNumber,
};
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