880
880 is a composite number, even, a calendar year.
Historical context — 880 AD
Calendar year
Year 880 (DCCCLXXX) was a leap year starting on Friday of the Julian calendar.
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Historical context — 880 BC
Decade
This article concerns the period 889 BC – 880 BC.
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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
-
Monday
January 1, 880
- Ended on
-
Tuesday
December 31, 880
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
880s
880–889
- Century
-
9th century
801–900
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,146
1146 years before 2026.
In other calendars
- Hebrew
-
4640 / 4641 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
266 / 267 AH
Lunar calendar; year spans differ from Gregorian.
- 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
-
1423 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
258 / 259 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
872 / 873 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
802 / 801 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 16
- Digit product
- 0
- Digital root
- 7
- Palindrome
- No
- Bit width
- 10 bits
- Reversed
- 88
- Flips to (rotate 180°)
- 88
- Recamán's sequence
- a(767) = 880
- Square (n²)
- 774,400
- Cube (n³)
- 681,472,000
- Divisor count
- 20
- σ(n) — sum of divisors
- 2,232
- φ(n) — Euler's totient
- 320
- Sum of prime factors
- 24
Primality
Prime factorization: 2 4 × 5 × 11
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- eight hundred eighty
- Ordinal
- 880th
- Roman numeral
- DCCCLXXX
- Binary
- 1101110000
- Octal
- 1560
- Hexadecimal
- 0x370
- Base64
- A3A=
- One's complement
- 64,655 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ωπʹ
- Mayan (base 20)
- 𝋢·𝋤·𝋠
- Chinese
- 八百八十
- Chinese (financial)
- 捌佰捌拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 880 = 8
- e — Euler's number (e)
- Digit 880 = 3
- φ — Golden ratio (φ)
- Digit 880 = 1
- √2 — Pythagoras's (√2)
- Digit 880 = 5
- ln 2 — Natural log of 2
- Digit 880 = 3
- γ — Euler-Mascheroni (γ)
- Digit 880 = 4
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 880, here are decompositions:
- 3 + 877 = 880
- 17 + 863 = 880
- 23 + 857 = 880
- 41 + 839 = 880
- 53 + 827 = 880
- 59 + 821 = 880
- 71 + 809 = 880
- 83 + 797 = 880
Showing the first eight; more decompositions exist.
UTF-8 encoding: CD B0 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.112.
- Address
- 0.0.3.112
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.112
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.