189 (number)

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

← 188 189 190 →
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Cardinalone hundred eighty-nine
Ordinal189th
(one hundred eighty-ninth)
Factorization33 × 7
Greek numeralΡΠΘ´
Roman numeralCLXXXIX
Binary101111012
Ternary210003
Octal2758
Duodecimal13912
HexadecimalBD16

In mathematics

189 is:

Also:

  • 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

References
  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.
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