Find the missing character in the following circular/triangular pattern sequence. Going clockwise, the numbers are:

The numbers follow a successive multiplication series starting from the top right quadrant and moving clockwise:
* $4\times 1=4$
* $4\times 2=8$
* $8\times 3=24$
* $24\times 4=96$
* $96\times 5=480$
* $480\times 6=2880$
* $2880\times 7=20160$

Therefore, the missing number is $2880$.