TextMesh Pro HasCharacters with searchFallbacks set to true

With the following function you get an output of missing characers, but it doesn't check the fallback fonts.
font.HasCharacters(tempMessage, out List<char> missing);

But if you use this function which supports the fallback fonts then it gives you an output of ints, what are these ints?
font.HasCharacters(tempMessage, out uint[] missing, true, true);

So how do I get the missing characters from the int value?

 

The array contains the Unicode values of the missing characters. For instance, the letter "A" would be 65.

This is an array of uint because Unicode values are 32 bit whereas the char type is only 16 bit.