וּמוֹשַׁב֙ בְּנֵ֣י יִשְׂרָאֵ֔ל אֲשֶׁ֥ר יָשְׁב֖וּ בְּמִצְרָ֑יִם שְׁלֹשִׁ֣ים שָׁנָ֔ה וְאַרְבַּ֥ע מֵא֖וֹת שָׁנָֽה׃
Now the time that the children of Israel dwelt in Egypt was four hundred and thirty years.
Read kabbalistic (mystical) interpretation of Exodus 12:40: and classical mystical sources.