The individual symbols, if that's what you mean, are called digits. That includes the zero, as well.
There are 60480 numbers.
123456789 + 123456789 = 246913578
3 and 9. And they divide into 123456789 whether or not you use divisibility rules!
15,241,578,750,190,521
1
Any multiple of 2520.
There are 504 such numbers.
5040 different 4 digit numbers can be formed with the digits 123456789. This is assuming that no digits are repeated with each combination.
There are 60480 numbers.
2520, for one.
The multiplicand and the multiplier.
numbers :P
2520 and 5040
They are known as Hindu-Arabic numerals
There are 3024 of them.
123456789 + 123456789 = 246913578
It is hard to determine a person that has a number tied to their name, unless you know what the numbers stand for. The numbers 123456789 could be an id number for someone in the government or a persons id number in witness protection.