46 (number)
From Wikipedia, the free encyclopedia
46 (forty-six) is the natural number following 45 and preceding 47.
| Cardinal | 46 forty-six |
| Ordinal | 46th forty-sixth |
| Factorization |  |
| Divisors | 1, 2, 23, 46 |
| Roman numeral | XLVI |
| Binary | 101110 |
| Hexadecimal | 2E |
Contents |
[edit] In mathematics
Forty-six is a Wedderburn-Etherington number, an enneagonal number and a centered triangular number. It is the sum of the totient function for the first twelve integers. 46 is the largest even integer that can't be expressed as a sum of two abundant numbers.
46 is the 13th semiprime. 46 is the third semiprime with a semiprime aliquot sum. The aliquot sequence of 46 is (46,26,16,15,9,4,3,1,0).
Since it is possible to find sequences of 46 consecutive integers such that each inner member member shares a factor with either the first or the last member, 46 is an Erdős–Woods number.
[edit] In science
- The atomic number of palladium
- The number of human chromosomes
[edit] Astronomy
- Messier object M46, a magnitude 6.5 open cluster in the constellation Puppis
- The New General Catalogue object NGC 46, a star in the constellation Pisces
- The Saros number of the solar eclipse series which began on -1371 April 1 and ended on -91 May 8. The duration of Saros series 46 was 1280.1 years, and it contained 72 solar eclipses.
- The Saros number of the lunar eclipse series which began on -1358 July 19 and ended on 12 October 8. The duration of Saros series 46 was 1370.5 years, and it contained 77 lunar eclipses.
[edit] In religion
- The total of books in the Old Testament, Catholic version, if the Book of Lamentations is counted as a book separate from the Book of Jeremiah
- In Psalm 46 in the King James Version of the Bible, the 46th word from the beginning is "shake" and the 46th word from the end is "spear"; at the time of publication of the King James Bible, playwright William Shakespeare was 46 years old
[edit] In sports
- The number of mountains in the 46 peaks of the Adirondack mountain range. People who have climbed all of them are called "forty-sixers"; there is also an unofficial 47th peak
- Valentino Rossi's race number in the MotoGP motorcycle world championship
- The name of a defensive scheme used in American football; see 46 defense
- The uniform number of current Boston Red Sox center fielder Jacoby Ellsbury.
[edit] In other fields
Forty-six is also:
- The code for international direct dial phone calls to Sweden
- The number of samurai, out of 47, who carried out the attack in the historical Ako vendetta; sometimes referred to as the 46 Ronins to discount the one samurai forced to turn back
- In the title of the movie Code 46, starring Tim Robbins and Samantha Morton
- Several routes numbered 46 exist throughout the world.
- Because 46 in Japanese can be pronounced as "yon roku", and "yoroshiku"（よろしく） means "my best regards" in Japanese, people sometimes use 46 for greeting.
- 46 is the number of the City Chevrolet and Superflo cars driven by Cole Trickle in the movie Days of Thunder.
At age 46:
- Ben Franklin conducted kite experiments, and discovered lightning is an electrical discharge
- Scottish surgeon, James Baird, discovered hypnosis
- Jack Nicklaus became oldest man ever to win golf's Masters
- Alfred Eisenstaedt took his a photo of a sailor sweeping up a girl in a kiss during the V-J day celebration in Times Square.
- Theodore Roosevelt was elected to a full term as President in 1904
- John F. Kennedy was assassinated on November 22, 1963
