4 million is a pretty large number. In fact, it's hard to wrap your head around just how big 4 million is. To put it into perspective, imagine that each person on Earth represented one second. Then, 4 million seconds would be just over 111 hours. That means that 4 million seconds ago, the world was only 111 hours old!
Now let's look at some other things that equal 4 million. For example, there are about 4 million people living in New York City. And if you stacked 4 million quarters on top of each other, they would reach almost 24 miles high!
As you can see, 4 million is a really big number. It's no wonder we have a hard time comprehending just how large it is. But hopefully this gives you a better idea of the size and scope of this impressive figure.