838
838 is a composite number, even, a calendar year.
Historical context — 838 AD
Calendar year
Year 838 (DCCCXXXVIII) was a common year starting on Tuesday of the Julian calendar.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →
Historical context — 838 BC
Decade
This article concerns the period 839 BC – 830 BC.
Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →
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
-
Friday
January 1, 838
- Ended on
-
Friday
December 31, 838
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
830s
830–839
- Century
-
9th century
801–900
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,188
1188 years before 2026.
In other calendars
- Hebrew
-
4598 / 4599 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
223 / 224 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Horse
Sexagenary cycle position 55 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1381 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
216 / 217 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
830 / 831 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
760 / 759 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 419
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- eight hundred thirty-eight
- Ordinal
- 838th
- Roman numeral
- DCCCXXXVIII
- Binary
- 1101000110
- Octal
- 1506
- Hexadecimal
- 0x346
- Base64
- A0Y=
- One's complement
- 64,697 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ωληʹ
- Mayan (base 20)
- 𝋢·𝋡·𝋲
- Chinese
- 八百三十八
- Chinese (financial)
- 捌佰參拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 838 = 5
- e — Euler's number (e)
- Digit 838 = 0
- φ — Golden ratio (φ)
- Digit 838 = 6
- √2 — Pythagoras's (√2)
- Digit 838 = 7
- ln 2 — Natural log of 2
- Digit 838 = 0
- γ — Euler-Mascheroni (γ)
- Digit 838 = 1
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 838, here are decompositions:
- 11 + 827 = 838
- 17 + 821 = 838
- 29 + 809 = 838
- 41 + 797 = 838
- 137 + 701 = 838
- 179 + 659 = 838
- 191 + 647 = 838
- 197 + 641 = 838
Showing the first eight; more decompositions exist.
UTF-8 encoding: CD 86 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.70.
- Address
- 0.0.3.70
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.70
Unspecified address (0.0.0.0/8) — "this network" placeholder.