178 (number)

178 (one hundred [and] seventy-eight) is the natural number following 177 and preceding 179.

In mathematics

• 178 is a deficient number, as 92 is less than 178
• 178 is a semiprime, a product of two primes, namely 2 and 89
• 178 is a square-free number
• 178 is the sum of 2 square numbers: (13)² + (3)²
• 178 is a 31-gonal number
• 178 is a digitally balanced number, as its binary number (10110010) has an equal number of zeros and ones
• 178 is palindromic in 3 consecutive bases = 454₆ = 343₇ = 262₈

In astronomy

• 178 Belisana is a rocky main belt asteroid
• 178P/Hug-Bell is a periodic comet in our solar system
• Arp 178 is a triplet of galaxies, in the constellation Boötes: NGC 56, NGC 5614, and NGC 5615

In computing

• DO-178B, Software Considerations in Airborne Systems and Equipment Certification is a guidance for software development
• INTEGRITY-178B is a royal-free ARINC 653–compliant real-time operating system

In the military

• 178th Battalion, CEF unit in the Canadian Expeditionary Force during World War I
• 178th Airlift Squadron unit of the North Dakota Air National Guard
• Blohm & Voss P.178 was an experimental jet-powered dive bomber during World War II
• Panhard 178 was an advanced French reconnaissance 4x4 armoured car during World War II
• USNS Flyer (T-AG-178) was a U.S. Navy miscellaneous auxiliary, bathymetric Survey Ship during World War II
• USNS Frederick Funston (T-AP-178) was a U.S. Navy Frederick Funston-class attack transport ship during World War II
• USS Fairfield (AK-178) was a U.S. Navy Alamosa-class cargo ship during World War II
• USS Herzog (DE-178) was a U.S. Navy Cannon class destroyer escort during World War II
• USS Hogan (DD-178) was a U.S. Navy Wickes class destroyer during World War II
• USS Lander (APA-178) was a Haskell-class attack transport during World War II
• USS Permit (SS-178) was a U.S. Navy Porpoise-class submarine during World War II
• USS Tunica (ATA-178) was a U.S. Navy Sotoyomo-class auxiliary fleet tugboat during World War II

In transportation

• Heinkel He 178 was the world's first aircraft to fly under turbojet power
• 178th-179th Street Tunnels are defunct vehicular tunnels in Upper Manhattan
• List of highways numbered 178

In other fields

178 is also:

• The year AD 178 or 178 BC
• 178 AH is a year in the Islamic calendar corresponds to 794 – 795 CE
• The atomic number of an element temporarily called Unseptoctium
• Minuscule 178 is a Greek minuscule manuscript of the New Testament

See also

• United Nations Security Council Resolution 178
• United States Supreme Court cases, Volume 178
• Takao Ozawa v. United States, 260 U.S. 178 (1922)
• Pennsylvania House of Representatives, District 178

External links

Wikimedia Commons has media related to 178 (number).

• Number Facts and Trivia: 178
• The Number 178
• The Positive Integer 178
• Number Gossip: 178