Английская Википедия:270 (number)
Материал из Онлайн справочника
Шаблон:Multiple issues Шаблон:Infobox number 270 (two hundred [and] seventy) is the natural number following 269 and preceding 271.
In mathematics
- 270 is a harmonic divisor number.[1]
- 270 is the fourth number that is divisible by its average integer divisor.[2]
- 270 degrees is equal to three-fourths of a turn.[3] This also means that <math>270^\circ=\frac{3\pi}{2}</math> radians.
- <math>270+1</math> and <math>270-1</math> are both prime numbers, making 270 surrounded by twin primes.[4]
References
Шаблон:Reflist Шаблон:Integers
