Numbers spreadsheet meets iPhone...

Can I open a simple Numbers spreadsheet as an e-mail attachment on my iPhone? No. I created a simple spreadsheet and saved it as a normal Numbers file. I opened Apple mail and sent a message to my Gmail account with the spreadsheet attached. I receive the message and the attachment is shown to be a zip file. I am not able to open it. This is an Apple spreadsheet and an Apple phone, yes? Please let me know if you get a different result.