178 (number)
178 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: 2 + 2
- 178 is a 31-gonal number
- 178 is a digitally balanced number, as its binary number 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 5613, 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
- 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 4×4 armoured car during World War II
- was a U.S. Navy miscellaneous auxiliary, bathymetric Survey Ship during World War II
- was a U.S. Navy during World War II
- was a U.S. Navy Alamosa-class cargo ship during World War II
- was a U.S. Navy during World War II
- was a U.S. Navy during World War II
- was a U.S. Navy during World War II
- was a U.S. Navy Porpoise-class submarine during World War II
- 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:
