The base of the Chinese number system is ten.
The number system commonly used by humans is base-ten.
The base is 10.
The decimal system is based on the number ten.
As far as I can see, 5649808 is already in the base ten number system.
In any system of counting, there are exactly the same number of digits as the base. They go from 0 to one less than the base.
Because each digit is ten times the one to the right of it.