Number 40 in British English words is forty.
Number consists of 2 digits, two-digit.

Number 40 in American English words is forty, in German words is vierzig, in French words is quarante, in Spanish words is cuarenta, in Italian words is quaranta, in Dutch words is veertig, in Danish words is fyrre.
If you want to write in words the number 40, it is necessary to use 5 characters.

Number 40 in binary code can be written 101000.

Number 40 in octal code can be written 50.

Number 40 in hexadecimal code can be written 28.

Number 40 in Roman numerals is XL.

Unix timestamp 40 converted to human readable date and time is Thursday January 1, 1970, 3:00 AM.

Decimal IP address 40 converted to dotted-decimal format is 0.0.0.40.

The square root of 40 is 6.3245553203368.
Number 40 multiplied by 2 equals 80.
Divided by 2 equals 20.
The sum of all digits equals 4.
Number 40 raised to the power of 2 is 1600.
Number 40 raised to the power of 3 is 64000.

The cosine of number 40 is -0.66693806165226.
The sine of number 40 is 0.74511316047935.
The tangent of number 40 is -1.1172149309239.
The radian equivalent of number 40 is 0.69813170079773.
The equivalent of number 40 in degrees is 2291.8311805233.
The base-10 logarithm of number 40 is 1.602059991328.

This number is even number (an integer that is evenly divisible by 2).
Number 40 is not a prime number.