285 (number) explained
Number: | 285 |
Divisor: | 1, 3, 5, 15, 19, 57, 95, 285 |
285 is the natural number following 284 and preceding 286.
In mathematics
- 285 is an odd composite number.[1]
- 285 is the 9th square pyramidal number. That means it is the sum of a number of consecutive perfect squares starting with 1. For 285, it is the sum of all of the single digits' perfect squares.[2]
- 285 is the number of variations possible with a binary rooted tree with 13 points. A binary rooted tree means that it always begins with 1 point that is rooted. From there, each point can branch in up to two directions.[3]
- 285 is a sphenic number which means that it has three prime factors.[4]
- 285 is a Harshad number. That means that it is divisible by the sum of its digits. 285 is divisible by 15.[5]
- 285 is a repdigit number in base 7. In base 7, 285 is 555.[6]
- 285 is a very symmetric number. If flipped horizontally, these numbers are symmetrical.
In technology
- The Turbojet 285 is a variation of the Williams Jet Tenders motorboat that is smaller than its other designs. It is designed for personal use.[7]
- In North America, the area code 285 does not exist. If you are receiving a call from a number that begins with 285, it is likely a spam call.[8]
World Records
- On December 9, 2022, Peter Thomson received the Guinness World Record for the greatest number of crossovers while jumping rope in a row.[9]
- On October 7, 2015, Camelot UK Lotteries Limited achieved the Guinness World Record for the longest champagne cork popping relay.[10]
- The Guinness World Record for the greatest number of people in an online video toast chain as of December 16, 2022, is 285. It was achieved in Cereser, Brazil.[11]
- On April 12, 2018, the Narraghmore Vintage Club received the Guinness World Record for having the largest parade of 285 tractors
Other fields
Notes and References
- Web site: Composite numbers. mathworld.wolfram.com.
- Web site: Square pyramidal number sequence. marhworld.wolfram.com.
- Web site: Binary rooted tree. mathworld.wolfram.com.
- Web site: Sphenic numbers. mathworld.wolfram.com.
- Web site: Harshad numbers. mathworld.wolfram.com.
- Web site: Repdigit numbers. mathworld.wolfram.com.
- Web site: Turbojet 285 Williams Jet Tenders motorboat. www.williamsjettenders.com.
- Web site: Area code 285. www.areacodehelp.com.
- Web site: Guinness World Record 285 crossovers whil jumping rope. www.guinnessworldrecords.com.
- Web site: Cork popping relay record. www.guinnessworldrecords.com.
- Web site: 285 people in a video toast chain. www.guinnessworldrecords.com.
- Web site: French Republican Calendar Guide. broadcast.lds.org.
- Web site: 285 Regina. in-the-sky.org.
- Web site: 285th Civil Engineering Squadron. vi.ng.mil.
- Web site: Interstate 285 is the most dangerous highway in the United States. www.schollelaw.com. 27 September 2021 .