Numbers 86,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

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86,073

[Math.]  860732 = 7,408,561,329, a square number using each of 10 digits 0-9 once. (The 68th of 87 such numbers).

 

86,164

[Astronomy]  The number of seconds in a sidereal day (86,164.094 seconds).

A sidereal month is the time interval for the Moon to complete one orbit around the Earth, relative a fixed star, 2,360,591.5104 seconds = 27 days 7 h 43 m 11.51 s.) A synodic month is the time interval between full moons, 2,551,466.2176 seconds = 29 days 12 h 44 m 26.22 s. (or 43m 12s).

Tropical year: 31,556,925.4752 seconds = 365 days 5 h 48 m 45.48 s. Sidereal year is the time interval the Earth returns to the same place in its orbit relative to a fixed star, 31,558,149.504 seconds = 365 days 6 h 9 m 9.5 s. Anomalistic year is 365 days 6 h 13 m 33 s.

 

861nn

[Zip]  No such U.S. Postal Zip Codes.

 

86,243

[Math.]  A prime number. A Mersenne exponent: 286243–1 is the 28th Mersenne prime number.

 

862nn

[Zip]  No such U.S. Postal Zip Codes.

 

86,400

[Calendar]  The number of seconds in a day.

1 week = 7 days = 168 hours = 10,080 minutes = 604,800 seconds.

 

[Math.]  Sum (in degrees) of all internal angles of a 482-side polygon.

 

86,453 

[Math.]  The only known 7 prime numbers consisting of the repeated digits 1 are the numbers of 2, 19, 23, 317, 1031, 49,081 and 86,453 digits 1. 

 

866nn

[Zip]  No such U.S. Postal Zip Codes.

 

86,720

[Library]  ISBN-0-19 is the International Standard Book Number for books published by Jones and Bartlett Publishers.

 

867nn

[Zip]  No such U.S. Postal Zip Codes.

 

868nn

[Zip]  No such U.S. Postal Zip Codes.

 

86,935

[Math.]  The 23rd Keith number.

 

869nn

[Zip]  No such U.S. Postal Zip Codes.

 

86nnn

[Zip]  U.S. Postal Zip Codes of Arizona: 85nnn and 86nnn.