40000 (number) - Selected Numbers

Selected Numbers

• 40000 – round number, 200 squared
• 40320 – smallest factorial that is not a highly composite number
• 40425 – square pyramidal number
• 40585 – largest factorion
• 40678 – pentagonal pyramidal number
• 40804 – palindromic square
• 41041 – Ryle number
• 41616 – triangular square number
• 41835 – Motzkin number
• 42680 – octahedral number
• 42925 – square pyramidal number
• 43261 – Markov number
• 43560 – pentagonal pyramidal number
• 43691 – Wagstaff prime
• 44100 – sum of the cubes of the first 20 positive integers, sampling rate of Red Book-compliant audio compact disks
• 44721 – When n > 44721, the expression 1/n - 1/(n+2) drops down to fractions of a billionth. The corresponding sum in the Leibniz formula for pi is 0.785386986.
• 44944 – palindromic square
• 45360 – highly composite number; first number to have 100 factors (including one and itself)
• 46233 – sum of the first eight factorials
• 46368 – Fibonacci number
• 46656 –
• 46657 – Carmichael number
• 46664 – Nelson Mandela's prisoner number
• 46853 – Number of customers in the SpongeBob SquarePants episode Patty Hype
• 47058 – primary pseudoperfect number
• 47806 – in hexadecimal it is written as "BABE"
• 49151 – Woodall number
• 49726 – pentagonal pyramidal number