Split large txt file into certain small file

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http://unix.stackexchange.com – I have a txt file which is formatted as 250,000 * 3600 (3600 rows and 250,000 column) I am going to split it into 3600 small txt which each file is 250,000 * 1. I understand the split can basically split large file into small ones with certain size. If I followed the same technique, I would get the same size of files but each file can be either 249,999 * 1 or 250,001 *1. Can anyone help me on this? (HowTos)