I would like to know more about the meanings of these numbers.

I know what a couple of them mean so I erased them
but these I just don't get can someone like make a small description of the numbers and what they mean thank you
Im trying to get beter with bitcoins and know all about it.

"blocks" : 399184,
"currentblocksize" : 749814,
"currentblocktx" : 1605,
"difficulty" : 163491654908.95926000,
"genproclimit" : -1,
"networkhashps" : 983842110216960512,
"pooledtx" : 8403,
"chain" : "main",

Thank yall's