Definitions:
an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations

a quantity or amount

a single issue of a magazine

a grammatical classification of words that consists typically of singular and plural, and, in greek and certain other languages, dual

amount to (a specified figure or quantity); comprise

mark with a number or assign a number to, typically to indicate position in a series

include or classify as a member of a group