190 (number)

Short description: Natural number

← 189 190 191 →
← 190 191 192 193 194 195 196 197 198 199 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred ninety
Ordinal	190th (one hundred ninetieth)
Factorization	2 × 5 × 19
Greek numeral	ΡϞ´
Roman numeral	CXC
Binary	101111102
Ternary	210013
Quaternary	23324
Quinary	12305
Senary	5146
Octal	2768
Duodecimal	13A12
Hexadecimal	BE16
Vigesimal	9A20
Base 36	5A36

190 (one hundred [and] ninety) is the natural number following 189 and preceding 191.

In mathematics

190 is a triangular number, a hexagonal number, and a centered nonagonal number, the fourth figurate number (after 1, 28, and 91) with that combination of properties. It is also a truncated square pyramid number.

Integers from 191 to 199

191

191 is a prime number.

192

192 = 2⁶ × 3 is a 3-smooth number, the smallest number with 14 divisors.

193

193 is a prime number.

194

194 = 2 × 97 is a Markov number, the smallest number written as the sum of three squares in five ways, and the number of irreducible representations of the Monster group.

195

195 = 3 × 5 × 13 is the smallest number expressed as a sum of distinct squares in 16 different ways.

196

196 = 2² × 7² is a square number.

197

197 is a prime number and a Schröder–Hipparchus number.

198

198 = 2 × 3² × 11 is the smallest number written as the sum of four squares in ten ways.

No integer factorial ever ends in exactly 198 zeroes in base 10 or in base 12.

There are 198 ridges on a U.S. dollar coin.

199

199 is a prime number and a centered triangular number.

In other fields

• 190 is the telephonic number of the 27 Brazilian Military Polices.

See also

• 190 (disambiguation)