1GB = 1024mb = 1048576kb = 1073741824 characters

Assume an average of 5 characters per word, plus a space = 178956970 words.

At 200 words per page, that's 894784 pages.

roughly 900,000 pages per 1GB of memory.

example:
200 words in a one page Microsoft word doc = 8KB
That = 128 pages in 1MB (1024 div by 8)
That = 131,072 pages in 1GB (1024 times 128)

This will vary greatly with the file format (txt or doc or pdf)

roughly 130,000 pages per 1GB of memory.