The Maya used a "vegistmal" or 20 based math system unlike our 10 based system. The Maya also used a zero within that system. Place notation was vertical rather than horizontal. The following is a list of the basic Mayan numbers. Note Mayan numbers could be written in a number of different ways including as complicated Glyphs.
Thus the figure of 8,456 would be written.
The figure 1, 576,234 would be written.
In each line the base amount is twenty times greater than the base amount of the previous line. It is important to note that in Mayan Calendrics a Tun does not equal 400 but 360, i.e., 18 x 20 not 20 x 20, and this effects all the numbers above it which work out as for example 7,616 days:
Sixth line = etc.
Fifth line = 160, 000’s
Fourth line = 8,000’s
Third line = 400’s
Second line = 20’s
First line = 1’s