The number 400


What is significant about the number 400?

  • 400 is 20²
  • 400 is divisible by: 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400
  • 400 equals 2⁴ * 5² or ( 2*2*2*2*5*5)
  • 400 is a self-number which are generated by this formula:  C_k = 8 \cdot 10^{k - 1} + C_{k - 1} + 8
  • You can write 400 like this: four hundred, which is referred to as its Cardinal representation
  • 400 comes after 399 and 401 follows 400
  • 400² is 160000
  • An HTTP Status code of 400 means, Bad Request, which could not be understood by the server due to a malformed syntax.
  • 6 minutes and 40 seconds is equal to 400 seconds
  • 400 is a Harshad number
  • 400 can be represented in Greek by Υ´
  • The scientific notation of 400 is 4 * 10²
  • There was an Atari 400 computer, my first computer was an Atari 1200XL
  • 400 in binary is 110010000
  • 400 is represented in Roman number CD
  • There are 400 days in a Gregorian calendar
  • 400 in hexadecimal is 0x190
  • The Sun is 400 times larger than the moon and 400 times further away from the Earth
  • Counting to 400 will take about 3 minutes
  • There is a Forbes 400 list of richest people which I am not on
  • There are 400 grades in a circle

Lastly, the number 400 is the number of articles I have written and posted to the MSDN platform.  This is my 400th.

Comments (1)

  1. Dave Rendón says:

    Congrats Benjamin! Truly inspiring work!

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