918
918 is a composite number, even, a calendar year.
Historical context — 918 AD
Calendar year
Year 918 (CMXVIII) was a common year starting on Thursday of the Julian calendar.
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Historical context — 918 BC
Decade
The 910s BC is a decade that lasted from 919 BC to 910 BC.
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Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
- 52
- Started on
-
Saturday
January 1, 918
- Ended on
-
Saturday
December 31, 918
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
910s
910–919
- Century
-
10th century
901–1000
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,108
1108 years before 2026.
In other calendars
- Hebrew
-
4678 / 4679 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
305 / 306 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Tiger
Sexagenary cycle position 15 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1461 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
296 / 297 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
910 / 911 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
840 / 839 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 18
- Digit product
- 72
- Digital root
- 9
- Palindrome
- No
- Bit width
- 10 bits
- Reversed
- 819
- Flips to (rotate 180°)
- 816
- Recamán's sequence
- a(587) = 918
- Square (n²)
- 842,724
- Cube (n³)
- 773,620,632
- Divisor count
- 16
- σ(n) — sum of divisors
- 2,160
- φ(n) — Euler's totient
- 288
- Sum of prime factors
- 28
Primality
Prime factorization: 2 × 3 3 × 17
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- nine hundred eighteen
- Ordinal
- 918th
- Roman numeral
- CMXVIII
- Binary
- 1110010110
- Octal
- 1626
- Hexadecimal
- 0x396
- Base64
- A5Y=
- One's complement
- 64,617 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ϡιηʹ
- Mayan (base 20)
- 𝋢·𝋥·𝋲
- Chinese
- 九百一十八
- Chinese (financial)
- 玖佰壹拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 918 = 6
- e — Euler's number (e)
- Digit 918 = 9
- φ — Golden ratio (φ)
- Digit 918 = 2
- √2 — Pythagoras's (√2)
- Digit 918 = 4
- ln 2 — Natural log of 2
- Digit 918 = 8
- γ — Euler-Mascheroni (γ)
- Digit 918 = 4
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 918, here are decompositions:
- 7 + 911 = 918
- 11 + 907 = 918
- 31 + 887 = 918
- 37 + 881 = 918
- 41 + 877 = 918
- 59 + 859 = 918
- 61 + 857 = 918
- 79 + 839 = 918
Showing the first eight; more decompositions exist.
UTF-8 encoding: CE 96 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.150.
- Address
- 0.0.3.150
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.150
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 918 is an active NANP area code (North American Numbering Plan).
- Primary area
- Tulsa
- 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.