"Printing the ASCII chars" is not really equivalent to "converting to hex". Which do you want? :)

If you want to print out 324789 as the binary representation of a long (in network order), for example, do this:

    print pack "N", 324789;
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Say instead that you want to print it out in hex; then you can do this:

    print unpack "H*", pack "N", 324789;
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Or you could use printf with the %x specifier.