1,622
1,622 is a composite number, even, a calendar year.
Notable events — 1622 AD
- Mar 22 Powhatan warriors kill nearly 350 settlers in the Jamestown Massacre.
- Apr 27 Mansfeld defeats Tilly at Wiesloch.
- Aug 6 Catholic forces win at Höchst.
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
-
Saturday
January 1, 1622
- Ended on
-
Saturday
December 31, 1622
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
March 27
Sunday, March 27, 1622
- Decade
-
1620s
1620–1629
- Century
-
17th century
1601–1700
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
404
404 years before 2026.
In other calendars
- Hebrew
-
5382 / 5383 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1031 / 1032 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Dog
Sexagenary cycle position 59 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2165 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1000 / 1001 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1614 / 1615 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1544 / 1543 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 11
- Digit product
- 24
- Digital root
- 2
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 2,261
- Recamán's sequence
- a(708) = 1,622
- Square (n²)
- 2,630,884
- Cube (n³)
- 4,267,293,848
- Divisor count
- 4
- σ(n) — sum of divisors
- 2,436
- φ(n) — Euler's totient
- 810
- Sum of prime factors
- 813
Primality
Prime factorization: 2 × 811
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand six hundred twenty-two
- Ordinal
- 1622nd
- Roman numeral
- MDCXXII
- Binary
- 11001010110
- Octal
- 3126
- Hexadecimal
- 0x656
- Base64
- BlY=
- One's complement
- 63,913 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵αχκβʹ
- Mayan (base 20)
- 𝋤·𝋡·𝋢
- Chinese
- 一千六百二十二
- Chinese (financial)
- 壹仟陸佰貳拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,622 = 1
- e — Euler's number (e)
- Digit 1,622 = 4
- φ — Golden ratio (φ)
- Digit 1,622 = 7
- √2 — Pythagoras's (√2)
- Digit 1,622 = 6
- ln 2 — Natural log of 2
- Digit 1,622 = 0
- γ — Euler-Mascheroni (γ)
- Digit 1,622 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1622, here are decompositions:
- 3 + 1619 = 1622
- 13 + 1609 = 1622
- 43 + 1579 = 1622
- 73 + 1549 = 1622
- 79 + 1543 = 1622
- 139 + 1483 = 1622
- 151 + 1471 = 1622
- 163 + 1459 = 1622
Showing the first eight; more decompositions exist.
UTF-8 encoding: D9 96 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.86.
- Address
- 0.0.6.86
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.86
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1622 first appears in π at position 8,396 of the decimal expansion (the 8,396ordinal-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.