1,858
1,858 is a composite number, even, a calendar year.
Notable events — 1858 AD
- Aug 16 Queen Victoria and President Buchanan exchange the first transatlantic telegraph messages.
- Aug 21 Lincoln and Douglas begin their senatorial debates in Illinois.
- Feb 11 Bernadette Soubirous reports the first Marian apparition at Lourdes.
- Aug 2 The Government of India Act ends East India Company rule; the Crown takes over.
- May 11 Minnesota becomes the 32nd US state.
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
-
Friday
January 1, 1858
- Ended on
-
Friday
December 31, 1858
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
April 4
Sunday, April 4, 1858
- Decade
-
1850s
1850–1859
- Century
-
19th century
1801–1900
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
168
168 years before 2026.
In other calendars
- Hebrew
-
5618 / 5619 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1274 / 1275 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
-
2401 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1236 / 1237 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1850 / 1851 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1780 / 1779 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 929
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand eight hundred fifty-eight
- Ordinal
- 1858th
- Roman numeral
- MDCCCLVIII
- Binary
- 11101000010
- Octal
- 3502
- Hexadecimal
- 0x742
- Base64
- B0I=
- One's complement
- 63,677 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αωνηʹ
- Mayan (base 20)
- 𝋤·𝋬·𝋲
- Chinese
- 一千八百五十八
- Chinese (financial)
- 壹仟捌佰伍拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,858 = 4
- e — Euler's number (e)
- Digit 1,858 = 8
- φ — Golden ratio (φ)
- Digit 1,858 = 6
- √2 — Pythagoras's (√2)
- Digit 1,858 = 8
- ln 2 — Natural log of 2
- Digit 1,858 = 6
- γ — Euler-Mascheroni (γ)
- Digit 1,858 = 1
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1858, here are decompositions:
- 11 + 1847 = 1858
- 47 + 1811 = 1858
- 71 + 1787 = 1858
- 137 + 1721 = 1858
- 149 + 1709 = 1858
- 191 + 1667 = 1858
- 239 + 1619 = 1858
- 251 + 1607 = 1858
Showing the first eight; more decompositions exist.
UTF-8 encoding: DD 82 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.66.
- Address
- 0.0.7.66
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.66
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1858 first appears in π at position 4,179 of the decimal expansion (the 4,179ordinal-suffix:th 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.