5440

5440 is a natural number that follows 5439 and precedes 5441. It is an even, composite integer used in counting, labeling, and various numeric contexts.

In mathematics, 5440 factorizes as 2^6 × 5 × 17. This gives 28 positive divisors. The sum of all divisors of 5440 is 13,716, and the Euler totient φ(5440) equals 2,048. The digit sum is 5 + 4 + 4 + 0 = 13, giving a digital root of 4. Because 5440 is not divisible by 13, it is not a Harshad (Niven) number in base 10.

In base representations, 5440 equals 1010101000000 in binary, 0x1540 in hexadecimal, and 12500 in octal. These forms reflect the same value expressed in different positional numeral systems.

Context and usage: as a plain number, 5440 can appear in arithmetic, measurements, catalog numbers, and product identifiers. It is also sometimes encountered in historical or cultural references that use numeric designations. A related but distinct reference is the name of the Canadian rock band 54-40, which uses a hyphen in its title; the digits share the same characters but are presented differently.

Yearly and historical notes: 5440 could denote a year in the distant future (5440 CE) or, in historical timelines, a year described within a timeline as 5440 BCE, depending on the era being discussed. As a four-digit identifier, 5440 is most often treated as a simple numeric label unless a specific domain assigns it meaning.