- 78 (number)
78 Cardinal seventy-eight Ordinal 78th
Numeral system 78 Factorization Divisors 1, 2, 3, 6, 13, 26, 39, 78 Roman numeral LXXVIII Binary 10011102 Octal 1168 Duodecimal 6612 Hexadecimal 4E16
77 and 78 form a Ruth-Aaron pair under the second definition in which repeated prime factors are counted as often as they occur.
Since it is possible to find sequences of 78 consecutive integers such that each inner member shares a factor with either the first or the last member, 78 is an Erdős–Woods number.
Karl A. Dahlke proved in 1989 that 78 heptominos of this shape ( ), at a minimum, are required to fill a rectangle.
In other fields
78 is also:
- In reference to gramophone records, 78 refers those meant to be spun at 78 revolutions per minute. Compare: LP, 33 1/3 and 45 rpm. 33+45=78
- A typical tarot deck containing the 21 trump cards, the Fool and the 56 suit cards make up 78 cards
- The total number of gifts in the song The Twelve Days of Christmas (since 78 is the 12th triangular number)
- The number of lines that make up Metatron's Cube
- The Rule of 78s is a method of yearly interest calculation
- Municipal Okrug 78, a municipal okrug of Tsentralny District of St. Petersburg, Russia
- ^ "Both wolves and dogs possess 78 chromosomes." Handbook of Applied Dog Behavior and Training by Steven R. Lindsay, Wiley-Blackwell (2000) p. 11
Wikimedia Foundation. 2010.
Look at other dictionaries:
Number Six (The Prisoner) — Number Six is the central fictional character in the 1960s television series The Prisoner, played by Patrick McGoohan. In the AMC remake, the character is played by Jim Caviezel, renamed Six . In several episodes, his attempts to escape his… … Wikipedia
Number Nine Visual Technology — Corporation was a manufacturer of video graphics chips and cards from 1982 to 1999. Number Nine developed the first 128 bit graphics processor (the Imagine 128), as well as the first 256 color and 16.8 million color cards. The name of the… … Wikipedia
Number 96 (TV series) — Number 96 Title card from a 1975 episode of Number 96. Where the cliff hanger resolution that followed this shot at the start of the episode took place in one of the building s flats, the shot of the building would zoom in on that flat as the… … Wikipedia
Number 1 (Goldfrapp song) — Number 1 Single by Goldfrapp from the album Supernature B side … Wikipedia
Number 1 (Tinchy Stryder song) — Number 1 Single by Tinchy Stryder featuring N Dubz from the album Catch 22 Against All Odds B side Stuck on … Wikipedia
Number One — or number one abbreviated #1, No 1 is used in a variety of meanings: Numerical * 1 (number) Music * #1 , an album by Fischerspooner * Konono N°1, a musical group from Kinshasa, Democratic Republic of the Congo * No.1 , an album by BoA * #1 , a… … Wikipedia
Number Ones (Janet Jackson album) — Number Ones / The Best Greatest hits album by Janet Jackson Released November 17, 2009 (see … Wikipedia
Number Two (The Prisoner) — Number Two was the title of the chief administrator of The Village in the 1967 68 British television series The Prisoner. More than 17 different actors appeared as holders of the office during the 17 episode series (some episodes featured more … Wikipedia
Number Six (Battlestar Galactica) — Number Six Battlestar Galactica character Promotional still of Number Six in season four First appearance … Wikipedia
Number 2 (Austin Powers) — Number 2 Austin Powers character First appearance Austin Powers: International Man of Mystery … Wikipedia
Number Ones: Up Close and Personal — World Tour Official poster for the tour Tour by Janet Jackson Associated album Number Ones … Wikipedia