580
580 is a composite number, even, a calendar year.
580 (five hundred eighty) is an even 3-digit number. It is a composite number with 12 divisors, and factors as 2² × 5 × 29. Its proper divisors sum to 680, more than the number itself, making it an abundant number. Written other ways, in Roman numerals it is DLXXX and in binary, 1001000100.
Interestingness
Historical context — 580 AD
Calendar year
Year 580 (DLXXX) was a leap year starting on Monday of the Julian calendar.
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Historical context — 580 BC
Calendar year
The year 580 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
-
Saturday
January 1, 580
- Ended on
-
Sunday
December 31, 580
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
580s
580–589
- Century
-
6th century
501–600
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,446
1446 years before 2026.
In other calendars
- Hebrew
-
4340 / 4341 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Metal zodiac:Rat
Sexagenary cycle position 37 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1123 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
572 / 573 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
502 / 501 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 2 × 5 × 29
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√580 = [24; (12, 48)]
Period length 2 — the block in parentheses repeats forever.
Representations
- In words
- five hundred eighty
- Ordinal
- 580th
- Roman numeral
- DLXXX
- Binary
- 1001000100
- Octal
- 1104
- Hexadecimal
- 0x244
- Base64
- AkQ=
- One's complement
- 64,955 (16-bit)
- Scientific notation
- 5.8 × 10²
- As a duration
- 580 s = 9 minutes, 40 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- φπʹ
- Mayan (base 20)
- 𝋡·𝋩·𝋠
- Chinese
- 五百八十
- Chinese (financial)
- 伍佰捌拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 580 = 2
- e — Euler's number (e)
- Digit 580 = 9
- φ — Golden ratio (φ)
- Digit 580 = 5
- √2 — Pythagoras's (√2)
- Digit 580 = 2
- ln 2 — Natural log of 2
- Digit 580 = 6
- γ — Euler-Mascheroni (γ)
- Digit 580 = 9
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 580, here are decompositions:
- 3 + 577 = 580
- 11 + 569 = 580
- 17 + 563 = 580
- 23 + 557 = 580
- 59 + 521 = 580
- 71 + 509 = 580
- 89 + 491 = 580
- 101 + 479 = 580
Showing the first eight; more decompositions exist.
UTF-8 encoding: C9 84 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.68.
- Address
- 0.0.2.68
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.2.68
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 580 is an active NANP area code (North American Numbering Plan).
- Primary area
- Lawton / Enid
- Region
- Oklahoma
- Country
- United States
Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.
Heard as a frequency, 580 Hz is closest to:
- Concert pitch (A4 = 440 Hz): D5 (587.3 Hz, -22¢)
- Scientific pitch (C4 = 256 Hz): D5 (574.7 Hz, +16¢)
- Baroque pitch (A4 = 415 Hz): D♯5 (586.9 Hz, -20¢)
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.