So, I'm trying to pull numbers out of a text field to set in another field via a workflow. Currently, I'm using :

regexp_replace({custitem1}, '[^0-9]', '')

Which is working, but if the string is a number / alpha / number I only want it to pull the leading numbers. So using the code above, "26A2" returns "262". What would be the best method to return just the "26"?