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From Wikipedia, the free encyclopedia

← 283  284  285 →
Cardinaltwo hundred eighty-four
Ordinal284th
(two hundred eighty-fourth)
Factorization22× 71
Divisors1, 2, 4, 71, 142, 284
Greek numeralΣΠΔ´
Roman numeralCCLXXXIV
Binary1000111002
Ternary1011123
Quaternary101304
Quinary21145
Senary11526
Octal4348
Duodecimal1B812
Hexadecimal11C16
VigesimalE420
Base 367W36

Two hundred eighty-four (284, CCLXXXIV) is the natural number following 283 and preceding 285.

Its divisors are 1, 2, 4, 71, and 142, adding up to 220, in turn, the divisors of 220 add up to 284, making the two a pair of amicable numbers.[1]

284 equals the sum of the squares of the digits of its own square in base 15. This property is shared with 1, 159, 264, 306 and 387.

There is no answer to the equation φ(x) = 284, making 284 a nontotient.

In other fields

See also the year 284 and List of highways numbered 284.

References

  1. ^ Higgins, Peter (2008). Number Story: From Counting to Cryptography. New York: Copernicus. p. 61. ISBN 978-1-84800-000-1.
This page was last edited on 20 October 2017, at 20:31
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