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278 (two hundred seventy-eight) is the natural number following 277 and preceding 279.

In mathematics

• 278 is an even composite number with 2 prime factors.
• 278 is equal to Φ(30). It is the sum of the totient function.
• 278 is a nontotient number which means that it is an even number that doesn't follow Euler's totient function.
• 278 is the smallest semiprime number that has an anagram that is also semiprime. The other number is 287.

World Records

• On October 29, 2011, April Mathis lifted the heaviest squat weight by a female at 278 kg in Orlando, Florida.
• On November 10, 1993, Tom Rodden received the Guinness World Record for shaving 278 people in one hour.
• On March 25, 2000, in Meadowhall Center, there were 278 human mannequins in the shopping center. They were in a total of 114 stores.
• On December 5, 2006, James Cripps received the Guinness World Record for the highest score in backwards bowling. The score was 278.

Other fields

• The calendar years 278 AD and 278 BC.
• 278 is the number of several highways in Canada, Japan, and the United States.
• 278 Paulina is an asteroid in the asteroid belt. It was discovered by Johann Palisa in Vienna.

References

1. "Composite numbers". mathworld.wolfram.com.
2. Sloane, N. J. A. (ed.). "Sequence A002088". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
3. "Nontotient numbers". mathworld.wolfram.com.
4. "Semiprime numbers". mathworld.wolfram.com.
5. "278 kg weight lift". www.guinnessworldrecords.com.
6. "278 people shaved in one hour". www.guinnessworldrecords.com.
7. "278 human mannequins in a shopping mall". www.guinnessworldrecords.com.
8. "278 backwards bowling score". www.guinnessworldrecords.com.
9. "278 Paulina information". www.universeguide.com. 27 March 2019.

• Integers