1,628
1,628 is a composite number, even, a calendar year.
Notable events — 1628 AD
- Aug 23 The Duke of Buckingham is assassinated at Portsmouth.
- Oct 28 La Rochelle surrenders to Cardinal Richelieu.
- Jun 7 England's Petition of Right is presented to Charles I.
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
-
Saturday
January 1, 1628
- Ended on
-
Sunday
December 31, 1628
- Friday the 13ths
-
1
One Friday the 13th this year.
- Easter Sunday
-
April 23
Sunday, April 23, 1628
- Decade
-
1620s
1620–1629
- Century
-
17th century
1601–1700
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
398
398 years before 2026.
In other calendars
- Hebrew
-
5388 / 5389 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1037 / 1038 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Dragon
Sexagenary cycle position 5 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2171 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1006 / 1007 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1620 / 1621 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1550 / 1549 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 17
- Digit product
- 96
- Digital root
- 8
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,261
- Recamán's sequence
- a(696) = 1,628
- Square (n²)
- 2,650,384
- Cube (n³)
- 4,314,825,152
- Divisor count
- 12
- σ(n) — sum of divisors
- 3,192
- φ(n) — Euler's totient
- 720
- Sum of prime factors
- 52
Primality
Prime factorization: 2 2 × 11 × 37
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand six hundred twenty-eight
- Ordinal
- 1628th
- Roman numeral
- MDCXXVIII
- Binary
- 11001011100
- Octal
- 3134
- Hexadecimal
- 0x65C
- Base64
- Blw=
- One's complement
- 63,907 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αχκηʹ
- Mayan (base 20)
- 𝋤·𝋡·𝋨
- Chinese
- 一千六百二十八
- Chinese (financial)
- 壹仟陸佰貳拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,628 = 2
- e — Euler's number (e)
- Digit 1,628 = 4
- φ — Golden ratio (φ)
- Digit 1,628 = 9
- √2 — Pythagoras's (√2)
- Digit 1,628 = 7
- ln 2 — Natural log of 2
- Digit 1,628 = 5
- γ — Euler-Mascheroni (γ)
- Digit 1,628 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1628, here are decompositions:
- 7 + 1621 = 1628
- 19 + 1609 = 1628
- 31 + 1597 = 1628
- 61 + 1567 = 1628
- 79 + 1549 = 1628
- 97 + 1531 = 1628
- 139 + 1489 = 1628
- 157 + 1471 = 1628
Showing the first eight; more decompositions exist.
UTF-8 encoding: D9 9C (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.92.
- Address
- 0.0.6.92
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.92
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1628 first appears in π at position 29,167 of the decimal expansion (the 29,167ordinal-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.