import java.util.*; class Niven_No { public static void main(String args[]) { Scanner sc=new Scanner(System.in); System.out.println("Enter a number"); int n=sc.nextInt(); int s=0,copy=n; while(n!=0) { int d=n%10; s=s+d; n=n/10; } if(copy%s==0) System.out.println("Niven number"); else System.out.println("Not a Niven number"); } }