How can I format custom field numbers with commas

How can I format custom field numbers with commas

I am adding a custom field in our opportunities and the type is INTEGER or even LONG INTEGER.  The problem is the default format does not put commas in so it is hard to read the number field correctly because the user sees 1000000 and it is hard for them to see that it is 1 Million and we would like to see 1,000,000 is there any way to show this with commas? thanks.