4 ms·
Aha! It's a Smith number! http://en.wikipedia.org/wiki/391_(number)#390s http://en.wikipedia.org/wiki/391_(number)#390s
by solox3 14y ago
Aha! It's a Smith number! http://en.wikipedia.org/wiki/391_(number)#390s http://en.wikipedia.org/wiki/391_(number)#390s