Template:HAZMAT Class 6 Packing Group Hazard Zone Inhaling Vapors
40,000 (forty thousand) is the natural number that comes after 39,999 and before 40,001. It is the square of 200.
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