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From Wikipedia, the free encyclopedia

← 188  189  190 →
Cardinal one hundred eighty-nine
Ordinal 189th
(one hundred eighty-ninth)
Factorization 33× 7
Greek numeral ΡΠΘ´
Roman numeral CLXXXIX
Binary 101111012
Ternary 210003
Quaternary 23314
Quinary 12245
Senary 5136
Octal 2758
Duodecimal 13912
Hexadecimal BD16
Vigesimal 9920
Base 36 5936

189 (one hundred [and] eighty-nine) is the natural number following 188 and preceding 190.

In mathematics

189 is:


  • 189 can be written as sum of two cubes in two ways: 43 + 53 and 63 + (-3)3 (The smallest number that can be written as the sum of 2 positive only cubes in two ways is 1729)
  • Divisors of 189: 1, 3, 7, 9, 21, 27, 63, 189

In astronomy

In geography

In the military

In music

In transportation

In other fields

189 is also:

See also

External links


  1. ^ "Sloane's A005898 : Centered cube numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28. 
  2. ^ "Sloane's A000566 : Heptagonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28. 
  3. ^ Sloane, N.J.A. (ed.). "Sequence A024916 (sum_{k=1..n} sigma(k) where sigma(n) = sum of divisors of n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. 
This page was last edited on 26 March 2018, at 21:15
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