Depending on the numbering system you use, you can make words "equal" almost any number. Also, the supposed traits that go with each number vary from source to source. This makes it even more of a pseudoscience than astrology because there's not even a stardardized methodology to it.
Take your name "Andrew Savage" for example. If I just count the letters in your name, I get 12, and 1+2 = 3, so I could say your name number is 3. Or I could assign values to each letter, such as A=1, B=2, etc. Then I would get another number. But if you call yourself "Andy" or "Drew" then the number changes again. Which is the "correct" number?
(Maybe you're supposed to take the average of all the numbers, lol)