-40 Degrees is the Temperature Where the Fahrenheit and Celsius Scales Meet (-40°F = -40°C)

Negative forty degrees is the temperature where the Fahrenheit and Celsius scales correspond with one another (-40°F = -40°C).  Forty is also considered a semi-perfect number owing to the fact that a subset of its divisors added together gives 40 (i.e. 1, 4, 5, 10, and 20).


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  • B moss

    I thought your article about “40” being the perfect number was pretty interesting. However,..forty isn’t a perfect number.the divisors are as follows; (1,4,5,10,20…..& 2!)

    Add all those and they equal 42.

    Anyways- it was cool while it lasted.

    Have a good day.

    • Anders

      We also can’t forget 8…. Making the total 50.

    • Bob

      He said subset.