568
568 is a composite number, even, a calendar year.
568 (five hundred sixty-eight) is an even 3-digit number. It is a composite number with 8 divisors, and factors as 2³ × 71. Written other ways, in Roman numerals it is DLXVIII and in binary, 1000111000.
Interestingness
Historical context — 568 AD
Calendar year
Year 568 (DLXVIII) was a leap year starting on Sunday of the Julian calendar.
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Historical context — 568 BC
Calendar year
The year 568 BC was a year of the pre-Julian Roman calendar.
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Year facts
- Year type
-
Leap year
Divisible by 4 and not by 100; February has 29 days.
- Days in year
- 366
- ISO weeks
- 52
- Started on
-
Friday
January 1, 568
- Ended on
-
Saturday
December 31, 568
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
560s
560–569
- Century
-
6th century
501–600
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,458
1458 years before 2026.
In other calendars
- Hebrew
-
4328 / 4329 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Earth zodiac:Rat
Sexagenary cycle position 25 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1111 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
560 / 561 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
490 / 489 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 3 × 71
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√568 = [23; (1, 4, 1, 46)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- five hundred sixty-eight
- Ordinal
- 568th
- Roman numeral
- DLXVIII
- Binary
- 1000111000
- Octal
- 1070
- Hexadecimal
- 0x238
- Base64
- Ajg=
- One's complement
- 64,967 (16-bit)
- Scientific notation
- 5.68 × 10²
- As a duration
- 568 s = 9 minutes, 28 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- φξηʹ
- Mayan (base 20)
- 𝋡·𝋨·𝋨
- Chinese
- 五百六十八
- Chinese (financial)
- 伍佰陸拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 568 = 7
- e — Euler's number (e)
- Digit 568 = 5
- φ — Golden ratio (φ)
- Digit 568 = 6
- √2 — Pythagoras's (√2)
- Digit 568 = 5
- ln 2 — Natural log of 2
- Digit 568 = 2
- γ — Euler-Mascheroni (γ)
- Digit 568 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 568, here are decompositions:
- 5 + 563 = 568
- 11 + 557 = 568
- 47 + 521 = 568
- 59 + 509 = 568
- 89 + 479 = 568
- 101 + 467 = 568
- 107 + 461 = 568
- 137 + 431 = 568
Showing the first eight; more decompositions exist.
UTF-8 encoding: C8 B8 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.56.
- Address
- 0.0.2.56
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.2.56
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 568 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C♯5 (554.4 Hz, +42¢)
- Scientific pitch (C4 = 256 Hz): D5 (574.7 Hz, -20¢)
- Baroque pitch (A4 = 415 Hz): D5 (554 Hz, +43¢)
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.