198 (number)

198 (one hundred [and] ninety-eight) is the natural number following 197 and preceding 199.

In mathematics

• 198 is an even number
• 198 is an abundant number, as 270 is greater than 198
• 198 is a composite number
• 198 is a Harshad number, divisible by the sum of its digits
• 198 is a practical number
• 198 is a self number
• 198 is between the twin prime pair of 197 and 199
• 198 is a 67-gonal number

In astronomy

• 198 Ampella is a large S-Type Main belt asteroid

In the military

• 198th Airlift Squadron flies the C-130 Hercules. It is a unit of the Puerto Rico Air National Guard
• 198th Battalion (Canadian Buffs), CEF was a unit in the Canadian Expeditionary Force during World War I
• 198th Infantry Brigade a unit of the United States Army Reserve's 99th Division from 1967–1971
• No. 198 Squadron RAF was a Royal Air Force aircraft squadron during World War II
• USNS Big Horn (T-AO-198) is a United States Navy Henry J. Kaiser fleet replenishment oiler
• USS Herndon (DD-198) was a United States Navy Clemson-class destroyer during World War I
• USS Keosanqua (ATA-198) was a United States Navy Maricopa-class auxiliary fleet tug following World War II
• USS Lovelace (DE-198) was a United States Navy Buckley class destroyer escort during World War II
• USS McCracken (APA-198) was a United States Navy Haskell-class attack transport during World War II
• USS Muskingum (AK-198) was a United States Navy Alamosa-class cargo ship during World War II
• USS Peacock (MSC-198) was a United States Navy Falcon class coastal minesweeper during the Vietnam War
• USS Tambor (SS-198) was the lead ship of her class of submarine in the United States Navy during World War II
• 198th Division was a military formation of the People's Volunteer Army during the Korean War

In sports

• Jordan 198 Formula One car during the 1998 season

In other fields

198 is also:

• The year AD 198 or 198 BC
• The atomic number of an element temporarily called Unennoctium
• Keeping the Promise for a Strong Economy Act (Budget Measures), 2002 ("Bill 198") is an Ontario legislative bill effective April 7, 2003 which provides for regulation of securities issued
• Minuscule 198 is a Greek minuscule manuscript of the New Testament

See also

• List of highways numbered 198
• United Nations Security Council Resolution 198

External links

Wikimedia Commons has media related to 198 (number).

• Number Facts and Trivia: 198
• The Number 198
• Number Gossip: 198
• The Positive Integer 198
• Prime Curiosities: 198
• Virtual Science: 198