The Number 1620: Properties and MeaningsPrime Factors of 1620=2x2x3x3x3x3x5.
The 1620 Geographos asteroid. The name was chosen to honour the National Geographic Society.
The Year 1620 ADIn the year 1620 AD the earliest human-powered submarine was invented.
In the year 1620 AD Robert Turner 'of Holshot', translator of magical texts, was born.(Esoteric History)
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