The Number 40: Properties and MeaningsPrime Factors of 40=2x2x2x5.
40 can be Partitioned 31185 ways.
40 is a Octagonal Number.
40 is a Centered 13-gonal Number.
40 is a Pentagonal Pyramidal Number.
40 is an Abundant Number.
The number of equivalent hyperspheres in 5 dimensions which can touch an equivalent hypersphere without any intersections=40.(Kissing Number)
40 is the only number whose letters are in alphabetical order.
The Chemical Element Zirconium has an atomic number of 40.
Bhagavan Sri Ramana Maharshi's "Forty Verses on Reality."
Film: 40 Days and 40 Nights.
Film: The 40 Year Old Virgin.
The Year 40 ADIn the year 40 AD Philo taught that all men are born free.
In the year 40 AD Empress Ma of the Han Dynasty was born.
In the year 40 AD Dio Chrysostom, Greek philosopher and historian was born.
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