Number 4 in British English words is four.
Number consists of 1 digit, one-digit.

Number 4 in American English words is four, in German words is vier, in French words is quatre, in Spanish words is cuatro, in Italian words is quattro, in Dutch words is vier, in Danish words is fire.
If you want to write in words the number 4, it is necessary to use 4 characters.

Number 4 in binary code can be written 100.

Number 4 in octal code can be written 4.

Number 4 in hexadecimal code can be written 4.

Number 4 in Roman numerals is IV.

Unix timestamp 4 converted to human readable date and time is Thursday January 1, 1970, 3:00 AM.

Decimal IP address 4 converted to dotted-decimal format is 0.0.0.4.

The square root of 4 is 2.
Number 4 multiplied by 2 equals 8.
Divided by 2 equals 2.
The sum of all digits equals 4.
Number 4 raised to the power of 2 is 16.
Number 4 raised to the power of 3 is 64.

The cosine of number 4 is -0.65364362086361.
The sine of number 4 is -0.75680249530793.
The tangent of number 4 is 1.1578212823496.
The radian equivalent of number 4 is 0.069813170079773.
The equivalent of number 4 in degrees is 229.18311805233.
The base-10 logarithm of number 4 is 0.60205999132796.

This number is even number (an integer that is evenly divisible by 2).
Number 4 is not a prime number.