1,838
1,838 is a composite number, even, a calendar year.
1,838 (one thousand eight hundred thirty-eight) is an even 4-digit number. It is a composite number with 4 divisors, and factors as 2 × 919. Written other ways, in Roman numerals it is MDCCCXXXVIII and in binary, 11100101110.
Interestingness
Notable events — 1838 AD
- Sep 3 Frederick Douglass escapes slavery, fleeing to New York.
- Dec 16 Voortrekkers defeat Zulus at the Battle of Blood River.
- May 26 The Cherokee Trail of Tears forced removals begin.
- Aug 24 Bohemian National Museum is opened in Prague.
- May 8 The People's Charter is published in Britain.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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
-
Monday
January 1, 1838
- Ended on
-
Monday
December 31, 1838
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 15
Sunday, April 15, 1838
- Decade
-
1830s
1830–1839
- Century
-
19th century
1801–1900
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
188
188 years before 2026.
In other calendars
- Hebrew
-
5598 / 5599 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1253 / 1254 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Dog
Sexagenary cycle position 35 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2381 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1216 / 1217 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1830 / 1831 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1760 / 1759 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 20
- Digit product
- 192
- Digital root
- 2
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,381
- Recamán's sequence
- a(8,068) = 1,838
- Square (n²)
- 3,378,244
- Cube (n³)
- 6,209,212,472
- Divisor count
- 4
- σ(n) — sum of divisors
- 2,760
- φ(n) — Euler's totient
- 918
- Sum of prime factors
- 921
Primality
Prime factorization: 2 × 919
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,838 = [42; (1, 6, 1, 4, 5, 1, 11, 2, 2, 3, 2, 42, 2, 3, 2, 2, 11, 1, 5, 4, 1, 6, 1, 84)]
Period length 24 — the block in parentheses repeats forever.
Representations
- In words
- one thousand eight hundred thirty-eight
- Ordinal
- 1838th
- Roman numeral
- MDCCCXXXVIII
- Binary
- 11100101110
- Octal
- 3456
- Hexadecimal
- 0x72E
- Base64
- By4=
- One's complement
- 63,697 (16-bit)
- Scientific notation
- 1.838 × 10³
- As a duration
- 1,838 s = 30 minutes, 38 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αωληʹ
- Mayan (base 20)
- 𝋤·𝋫·𝋲
- Chinese
- 一千八百三十八
- Chinese (financial)
- 壹仟捌佰參拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,838 = 0
- e — Euler's number (e)
- Digit 1,838 = 9
- φ — Golden ratio (φ)
- Digit 1,838 = 5
- √2 — Pythagoras's (√2)
- Digit 1,838 = 5
- ln 2 — Natural log of 2
- Digit 1,838 = 8
- γ — Euler-Mascheroni (γ)
- Digit 1,838 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1838, here are decompositions:
- 7 + 1831 = 1838
- 37 + 1801 = 1838
- 61 + 1777 = 1838
- 79 + 1759 = 1838
- 97 + 1741 = 1838
- 139 + 1699 = 1838
- 181 + 1657 = 1838
- 211 + 1627 = 1838
Showing the first eight; more decompositions exist.
UTF-8 encoding: DC AE (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.46.
- Address
- 0.0.7.46
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.46
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,838 Hz is closest to:
- Concert pitch (A4 = 440 Hz): A♯6 (1864.7 Hz, -25¢)
- Scientific pitch (C4 = 256 Hz): A♯6 (1824.6 Hz, +13¢)
- Baroque pitch (A4 = 415 Hz): B6 (1863.3 Hz, -24¢)
The digit sequence 1838 first appears in π at position 14,891 of the decimal expansion (the 14,891ordinal-suffix:st digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.