The number 350 has no prominent independent symbolic meaning in biblical or Jewish tradition, but it is linked to Noah's lifespan after the flood.
According to Genesis 9:28, Noah lived 350 years after the flood. The number is therefore primarily a narrative figure rather than one with deep symbolic significance in itself. Noah's life after the flood represents the new beginning for humanity, and those 350 years constitute the period during which Noah witnessed the rebuilding of the world. In Jewish numerology (gematria) and biblical symbolism, the number 350 is not assigned any special mystical or theological interpretation beyond this historical reference. In rabbinic tradition, there is discussion about why the Torah specifically mentions Noah's lifespan after the flood (350 years) separately from his total age (950 years). Some commentators see this as a distinction between the old world and the new, where Noah's post-flood life marks a new epoch in human history.*