46 (number)
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46 is a natural number that lies between 45 and 47. It is an even number because it is divisible by two with no remainder. In Roman numerals it is written as XLVI.
Its divisors are 1, 2, 23, and 46. Therefore 46 is a composite number, equal to 2 × 23. Since both factors are prime numbers, 46 is a semiprime.
Mathematical properties
The sum of its proper divisors—1 + 2 + 23—equals 26, which is less than 46. Thus 46 is a deficient number. In binary notation it is written as 101110, and in hexadecimal as 2E.
In various number systems, 46 belongs to the set of integers used in standard counting and ordering. Mathematical properties involving specific classes—such as membership in certain sequences—depend on the definition of those classes and are not intrinsic properties.
Uses and other references
46 serves as a numeral in various contexts: in years (for example, 1946), in country calling codes for telecommunications, and in sports numbering. The code 46 in the international telephone numbering system is assigned to Sweden.
In life sciences, the number of chromosomes in a normal human cell is 46 (23 pairs). This number is among the fundamental characteristics of human heredity.