230 (number)

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← 229 230 231 →
Cardinal two hundred thirty
Ordinal 230th
(two hundred thirtieth)
Factorization 2 × 5 × 23
Greek numeral ΣΛ´
Roman numeral CCXXX
Binary 111001102
Ternary 221123
Senary 10226
Octal 3468
Duodecimal 17212
Hexadecimal E616

230 (two hundred [and] thirty) is the natural number following 229 and preceding 231.

Additionally, 230 is:

The aliquot sequence starting at 224 is: 224, 280, 440, 640, 890, 730, 602, 454, 230, 202, 104, 106, 56, 64, 63, 41, 1, 0.

There are 230 unique space groups describing all possible crystal symmetries.

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360 is the natural number following 359 and preceding 361.

400 is the natural number following 399 and preceding 401.

500 is the natural number following 499 and preceding 501.

700 is the natural number following 699 and preceding 701.

600 is the natural number following 599 and preceding 601.

800 is the natural number following 799 and preceding 801.

900 is the natural number following 899 and preceding 901. It is the square of 30 and the sum of Euler's totient function for the first 54 positive integers. In base 10, it is a Harshad number. It is also the first number to be the square of a sphenic number.

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References

  1. ↑ "Sloane's A007304 : Sphenic numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-09-05.
  2. ↑ "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-09-05.
  3. ↑ "Sloane's A005277 : Nontotients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-09-05.
  4. ↑ Sloane, N. J. A. (ed.). "SequenceA000096(a(n) = n*(n+3)/2)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.


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