[SLE] Webmin 64 bit?

I recently installed webmin-1.290-1.noarch.rpm on my 64 bit SUSE 10.1 system. According to the package name, it's "noarch". Does this mean it compiles for the CPU on installation? Or it doesn't care if it's installed on various distros? Is there any simple method to tell if an app is 64 or 32 bit? tnx jk