Approximately four weeks (4 times 7 days) to a lunar month (synodic month = 29.54 days). Thus the number four is universally an integral part of primitive sacred calendars.
Explore the curious properties of number 4, an even composite number composed of a single prime multiplied by itself. Includes mathematical info, prime factorization, divisors, bases and much more!
A West Arabic numeral, ultimately from Indic numerals (compare Devanagari ४ (4)), a cursive form of four lines (to represent the number four) arranged in the shape of a cross (resembling +).
Properties of the number 4: factors, prime check, fibonacci check, bell number check, binary, octal, hexadecimal representations and more.