It depends on which place value is given!
100,000
There are 504 such numbers.
12
823543
6
9999
100,000
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 504 such numbers.
512
12
There are 5! = 120 such numbers.
The number 1234567890 can create about 39 of 40 4 digit numbers.
There are 60480 numbers.
823543
6
840