Unix File Permission's

File Permissions:

r=4
w=2
x=1

in every group. Your example is 6(r+w=4+2)4(r=4)4(r=4).

-rw-r--r-- 1 root root 436644612 Nov  4 12:30 jbfsw-60-6.0.0.102.rpm

4+2/4/4

chmod 644 jbfsw-60-6.0.0.102.rpm