1,860
1,860 is a composite number, even, a calendar year.
Notable events — 1860 AD
- Nov 6 Abraham Lincoln is elected US president.
- Dec 20 South Carolina becomes the first state to secede from the Union.
- Oct 13 Garibaldi's troops victorious at Volturno, paving the way for Italian unification.
- Apr 3 The Pony Express begins service between Missouri and California.
- Oct 18 The Anglo-French capture of Beijing ends the Second Opium War.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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
-
Sunday
January 1, 1860
- Ended on
-
Monday
December 31, 1860
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Easter Sunday
-
April 8
Sunday, April 8, 1860
- Decade
-
1860s
1860–1869
- Century
-
19th century
1801–1900
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
166
166 years before 2026.
- US presidential election
-
Yes
US holds a presidential election in years divisible by 4 starting from 1788.
In other calendars
- Hebrew
-
5620 / 5621 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1276 / 1277 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Monkey
Sexagenary cycle position 57 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2403 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1238 / 1239 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1852 / 1853 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1782 / 1781 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 15
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 681
- Flips to (rotate 180°)
- 981
- Recamán's sequence
- a(8,024) = 1,860
- Square (n²)
- 3,459,600
- Cube (n³)
- 6,434,856,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 5,376
- φ(n) — Euler's totient
- 480
- Sum of prime factors
- 43
Primality
Prime factorization: 2 2 × 3 × 5 × 31
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand eight hundred sixty
- Ordinal
- 1860th
- Roman numeral
- MDCCCLX
- Binary
- 11101000100
- Octal
- 3504
- Hexadecimal
- 0x744
- Base64
- B0Q=
- One's complement
- 63,675 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹 ·
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵αωξʹ
- Mayan (base 20)
- 𝋤·𝋭·𝋠
- Chinese
- 一千八百六十
- Chinese (financial)
- 壹仟捌佰陸拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,860 = 9
- e — Euler's number (e)
- Digit 1,860 = 8
- φ — Golden ratio (φ)
- Digit 1,860 = 1
- √2 — Pythagoras's (√2)
- Digit 1,860 = 6
- ln 2 — Natural log of 2
- Digit 1,860 = 4
- γ — Euler-Mascheroni (γ)
- Digit 1,860 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1860, here are decompositions:
- 13 + 1847 = 1860
- 29 + 1831 = 1860
- 37 + 1823 = 1860
- 59 + 1801 = 1860
- 71 + 1789 = 1860
- 73 + 1787 = 1860
- 83 + 1777 = 1860
- 101 + 1759 = 1860
Showing the first eight; more decompositions exist.
UTF-8 encoding: DD 84 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.68.
- Address
- 0.0.7.68
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.68
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1860 first appears in π at position 4,783 of the decimal expansion (the 4,783ordinal-suffix:rd 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.