186 (number)

In mathematics

• 186 is an even number
• 186 is an abundant number, as 198 is greater than 186
• 186 is a composite number
• There is no integer with exactly 186 coprimes less than it. 186 is a nontotient, nor is it ever the difference between an integer and the total of coprimes below it, thus also a noncototient
• 186 is an odious number
• 186 is a sphenic number, so the Möbius function returns -1
• 186 is a square-free number
• 186 is a 14-gonal number and a 63-gonal number
• 186 factors: 2 × 3 × 31
• 186 divisors: 1, 2, 3, 6, 31, 62, 93, 186
• There are 186 degree-11 irreducible polynomials over a Galois field with 2 elements

  In astronomy

• 186 Celuta is a large S-type asteroid Main belt asteroid
• POX 186 is a small galaxy still forming

  In geography

• Abernethy No. 186, Saskatchewan is a rural municipality in Saskatchewan, Canada

  In the military

• was a Royal Fleet Auxiliary armament stores carrier following World War II
• was a United States Navy Victory ship during World War II
• was a United States Navy destroyer during World War II
• was a United States Navy tanker ship during World War II
• was a United States Navy Alamosa-class cargo ship during World War II
• was a United States Navy Cimarron-class ship from 1981–1999
• was a United States Navy during World War II
• was a United States Navy during World War II

  In transportation

• The 186 is a legendary 6-cylinder Holden engine, that was first used in the Holden HR series. It has a piston displacement of 186 cubic inches.
• London Buses route 186
• Cosmos 186 and Cosmos 188 incorporated a Soyuz programme descent module for landing scientific instruments and test objects

  In other fields

• The year AD 186 or 186 BC
• The atomic number of an element temporarily called
• Minuscule 186 is a Greek minuscule manuscript of the New Testament, on parchment