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/*

* @param {number} num

* @return {boolean}

*/

var checkPerfectNumber = function(num) {

var base = 1;

var res = 0;

if(num===0) return false;

if(num%10==6||num%10==8){

if(num===6) return true;

while(res<num){

res += Math.pow(base,3);

base +=2;

}

}

return res===num;

};