286 (number) explained

Number:	286
Divisor:	1, 2, 11, 13, 22, 26, 143, 286

286 is the natural number following 285 and preceding 287.

In mathematics

• 286 is an even composite number with 3 prime factors.^[1]
• 286 is in the smallest pair of nontotient anagrams with 268.
• 286 is a tetrahedral number which means that represents a tetrahedron.^[2]
• 286 is a sphenic number which means that it has exactly 3 prime factors.^[3]
• 286 the first even pseudoprime to base 3.

World Records

• On November 7, 2013, Alastair Galpin received the Guinness World Record for the fastest time to slice 10 matches in half. He completed it in 2.86 seconds.^[4]
• On April 27, 2013, the largest tiramisu-making lesson ensued in Japan with 286 participants.^[5]
• On September 21, 2007, the largest steel drum ensemble was achieved in Poznan, Poland. There were 286 members.^[6]
• On November 12, 2017, Toyota achieved the Guinness World Record for the greatest number of toy cars launched simultaneously. There were 286 toy cars.^[7]

Other fields

• The calendar years 286 AD and 286 BC.
• 286 is the number of several highways in Japan and the United States.
• 286 Iclea is an asteroid in the asteroid belt. It was discovered by Johann Palisa in Vienna, Austria.^[8]

Notes and References

1. Web site: Composite numbers. mathworld.wolfram.com.
2. Web site: Tetrahedral numbers. mathworld.wolfram.com.
3. Web site: Sphenic numbers. mathworld.wolfram.com.
4. Web site: 2.86 seconds to halve 10 matches. www.guinnessworldrecords.com.
5. Web site: 286 people at a tiramisu-making lesson. www.guinnessworldrecords.com.
6. Web site: 286 people in a steel drum ensemble. www.guinnessworldrecords.com.
7. Web site: 286 toy cars released at the same time. www.guinnessworldrecords.com.
8. Web site: 286 Iclea. in-the-sky.org.