CHECK IF THE NUMBER IS PERFECT OR NOT

 EXAMPLES ----> 6 has factor 3,2,1 and 6. But a number is perfect when it is equal to the sum of its proper divisor excluding the number itself  as 6 = 3+2+1

package com.cnc;


public class Main {

    public static void main(String[] args) {
        System.out.println(isPerfectNumber(28));
    }

    public static boolean isPerfectNumber(int number) {
        int sum = 0;
        if (number < 1) return false;
        else
            for (int a = 1; a < number; a++) {
                if ((number % a == 0)) {
                    sum = sum +a;
                }
                if(sum==number) return true;
            } return false;
    }

}  

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