World Library  
Flag as Inappropriate
Email this Article

228 (number)

Article Id: WHEBN0037631784
Reproduction Date:

Title: 228 (number)  
Author: World Heritage Encyclopedia
Language: English
Subject: 229 (number), 495 (number), 420 (number), 801 (number), 359 (number)
Collection: Integers
Publisher: World Heritage Encyclopedia
Publication
Date:
 

228 (number)

228 (two hundred [and] twenty eight) is the natural number following 227 and preceding 229.

227 228 229
Cardinal two hundred twenty-eight
Ordinal 228th
(two hundred and twenty-eighth)
Factorization 22× 3 × 19
Prime no
Roman numeral CCXXVIII
Binary 111001002
Ternary 221103
Quaternary 32104
Quinary 14035
Senary 10206
Octal 3448
Duodecimal 17012
Hexadecimal E416
Vigesimal B820
Base 36 6C36

228 is a refactorable number,[1] and a practical number.[2] There are 228 matchings in a ladder graph with five rungs.[3] 228 is the smallest even number n such that the numerator of the nth Bernoulli number is divisible by a nontrivial square number that is relatively prime to n.[4]

References

  1. ^ "Sloane's A033950 : Refactorable numbers", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. ^ "Sloane's A005153 : Practical numbers", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ "Sloane's A030186 : a(n) = 3a(n-1) + a(n-2) - a(n-3)", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^ "Sloane's A090943 : Even numbers n such that N(n) is divisible by a nontrivial square, m^2, say and GCD(n,m)=1, where N(n) is the numerator of the Bernoulli number B(n)", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.