function is_perfect(number)  
{  
var temp = 0;  
   for(var i=1;i<=number/2;i++)  
     {  
         if(number%i === 0)  
          {  
            temp += i;  
          }  
     }  
     
     if(temp === number && temp !== 0)  
        {  
       console.log("It is a perfect number.");  
        }   
     else  
        {  
       console.log("It is not a perfect number.");  
        }     
 }   
is_perfect(28);