Number

568

568 is a composite number, even, a calendar year.

Arithmetic Number Ascending Digits Deficient Number Evil Number Recamán's Sequence Year

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.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

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

Parity: Even
Digit count: 3
Digit sum: 19
Digit product: 240
Digital root: 1
Palindrome: No
Bit width: 10 bits
Reversed: 865
Recamán's sequence: a(1,123) = 568
Square (n²): 322,624
Cube (n³): 183,250,432
Divisor count: 8
σ(n) — sum of divisors: 1,080
φ(n) — Euler's totient: 280
Sum of prime factors: 77

Primality

Prime factorization: 2 ³ × 71

Nearest primes: 563 (−5) · 569 (+1)

Divisors & multiples

All divisors (8)

1 · 2 · 4 · 8 · 71 · 142 · 284 (half) · 568

Aliquot sum (sum of proper divisors): 512

Factor pairs (a × b = 568)

1 × 568

2 × 284

4 × 142

8 × 71

First multiples

568 · 1,136 (double) · 1,704 · 2,272 · 2,840 · 3,408 · 3,976 · 4,544 · 5,112 · 5,680

Sums & aliquot sequence

As consecutive integers: 28 + 29 + … + 43

Aliquot sequence: 568 → 512 → 511 → 81 → 40 → 50 → 43 → 1 → 0 — terminates at zero

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)

In other bases

ternary (3) 210001

quaternary (4) 20320

quinary (5) 4233

senary (6) 2344

septenary (7) 1441

nonary (9) 701

undecimal (11) 477

duodecimal (12) 3b4

tridecimal (13) 349

tetradecimal (14) 2c8

pentadecimal (15) 27d

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

In other modern scripts

Eastern Arabic ٥٦٨ Devanagari ५६८ Bengali ৫৬৮ Tamil ௫௬௮ Thai ๕๖๘ Tibetan ༥༦༨ Khmer ៥៦៨ Lao ໕໖໘ Burmese ၅၆၈

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 decomposition

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.

Unicode codepoint

Latin Small Letter Db Digraph

U+0238

Lowercase letter (Ll)

UTF-8 encoding: C8 B8 (2 bytes).

Lookup U+0238 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000238

RGB(0, 2, 56)

IPv4 address

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.