289 is the natural number following 288 and preceding 290.

← 288 289 290 →
Cardinaltwo hundred eighty-nine
Ordinal289th
(two hundred eighty-ninth)
Factorization172
Divisors1, 17, 289
Greek numeralΣΠΘ´
Roman numeralCCLXXXIX
Binary1001000012
Ternary1012013
Senary12016
Octal4418
Duodecimal20112
Hexadecimal12116

In mathematics

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  • 289 is an odd composite number with only one prime factor.[1]
  • 289 is the 9th Friedman number. Friedman numbers are numbers that can be written by using its own digits the exact number of times they show up in the number. This one can be expressed as (8+9)².[2]
  • 289 is a perfect square being equal to 17². It is also the 7th number to only have 3 factors because it is a square of a prime number.
  • 289 is the sum of perfect cubes. It is the sum of 1³+2³+4³+6³.
  • 289 is equivalent to the sum of the first 5 whole numbers to their respective powers. It is equal to 0⁰+1¹+2²+3³+4⁴.

In technology

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  • The area code 289 is shared with 905 in the area in southern Ontario surrounding the greater Toronto metropolitan area.[3]
  • The Fluke 289 True-RMS Industrial Logging Digital Multimeter with Trendcapture is a tool designed to find signal in certain areas. It has a graphic visualization of this information that it displays on its screen. It can store up to 15,000 data points.[4]
  • The 289 series is a style of train that is operated by the West Japan Railway Company. It uses a DC EMU as opposed to the dual-voltage 683 series that preceded it.[5]

World Records

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Other fields

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References

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  1. ^ "Facts about the integer". mathworld.wolfram.com.
  2. ^ "Friedman numbers" (PDF). illuminations.nctm.org.
  3. ^ "285 area code". clerk.chat.
  4. ^ "Fluke 289 True-RMS Industrial Logging Digital Multimeter". www.tequptment.net.
  5. ^ "Japan's 289 series train". news.mynavi.jp. April 28, 2015.
  6. ^ Suggitt, Connie (February 15, 2022). "World's heaviest strawberry". www.guinnessworldrecords.com.
  7. ^ "Farthest flight by a paper aircraft". www.guinnessworldrecords.com.
  8. ^ "289 people drumming in Swiss Balls simultaneously". www.guinnessworldrecords.com.
  9. ^ "Most steeplechase wins in one racing season". www.guinnessworldrecords.com.
  10. ^ "Highest golf score to win US Masters". www.guinnessworldrecords.com.
  11. ^ "French Republican Calendar Guide" (PDF). broadcast.lds.org.
  12. ^ "289 Nenetta asteroid". ssd.jpl.nasa.gov.
  13. ^ "US Army Information". armypubs.army.mil.
  14. ^ "Comet 289P/Blanpain reference". www.spacereference.org.
  15. ^ "289 Commando Troop information". www.army.mod.uk.