980
980 is a composite number, even, a calendar year.
Historical context — 980 AD
Calendar year
Year 980 (CMLXXX) was a leap year starting on Thursday of the Julian calendar.
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Historical context — 980 BC
Decade
The 980s BC is a decade that lasted from 989 BC to 980 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
-
Saturday
January 1, 980
- Ended on
-
Sunday
December 31, 980
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
980s
980–989
- Century
-
10th century
901–1000
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,046
1046 years before 2026.
In other calendars
- Hebrew
-
4740 / 4741 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
369 / 370 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Dragon
Sexagenary cycle position 17 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1523 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
358 / 359 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
972 / 973 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
902 / 901 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 10 bits
- Reversed
- 89
- Flips to (rotate 180°)
- 86
- Recamán's sequence
- a(4,459) = 980
- Square (n²)
- 960,400
- Cube (n³)
- 941,192,000
- Divisor count
- 18
- σ(n) — sum of divisors
- 2,394
- φ(n) — Euler's totient
- 336
- Sum of prime factors
- 23
Primality
Prime factorization: 2 2 × 5 × 7 2
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- nine hundred eighty
- Ordinal
- 980th
- Roman numeral
- CMLXXX
- Binary
- 1111010100
- Octal
- 1724
- Hexadecimal
- 0x3D4
- Base64
- A9Q=
- One's complement
- 64,555 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ϡπʹ
- Mayan (base 20)
- 𝋢·𝋩·𝋠
- Chinese
- 九百八十
- Chinese (financial)
- 玖佰捌拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 980 = 8
- e — Euler's number (e)
- Digit 980 = 5
- φ — Golden ratio (φ)
- Digit 980 = 5
- √2 — Pythagoras's (√2)
- Digit 980 = 6
- ln 2 — Natural log of 2
- Digit 980 = 9
- γ — Euler-Mascheroni (γ)
- Digit 980 = 3
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 980, here are decompositions:
- 3 + 977 = 980
- 13 + 967 = 980
- 43 + 937 = 980
- 61 + 919 = 980
- 73 + 907 = 980
- 97 + 883 = 980
- 103 + 877 = 980
- 127 + 853 = 980
Showing the first eight; more decompositions exist.
UTF-8 encoding: CF 94 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.212.
- Address
- 0.0.3.212
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.212
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 980 is an active NANP area code (North American Numbering Plan).
- Primary area
- Charlotte
- Region
- North Carolina
- 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.