1,630
1,630 is a composite number, even, a calendar year.
1,630 (one thousand six hundred thirty) is an even 4-digit number. It is a composite number with 8 divisors, and factors as 2 × 5 × 163. Written other ways, in Roman numerals it is MDCXXX and in binary, 11001011110.
Interestingness
Notable events — 1630 AD
- Jul 6 Sweden enters the Thirty Years' War under Gustavus Adolphus.
- Jun 17 The Boston settlement is founded as part of Massachusetts Bay Colony.
- Sep 14 Trade routes shift after Spanish reform.
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
-
Tuesday
January 1, 1630
- Ended on
-
Tuesday
December 31, 1630
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
March 31
Sunday, March 31, 1630
- Decade
-
1630s
1630–1639
- Century
-
17th century
1601–1700
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
396
396 years before 2026.
In other calendars
- Hebrew
-
5390 / 5391 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1039 / 1040 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Metal zodiac:Horse
Sexagenary cycle position 7 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2173 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1008 / 1009 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1622 / 1623 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1552 / 1551 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 5 × 163
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,630 = [40; (2, 1, 2, 8, 1, 1, 2, 13, 16, 13, 2, 1, 1, 8, 2, 1, 2, 80)]
Period length 18 — the block in parentheses repeats forever.
Representations
- In words
- one thousand six hundred thirty
- Ordinal
- 1630th
- Roman numeral
- MDCXXX
- Binary
- 11001011110
- Octal
- 3136
- Hexadecimal
- 0x65E
- Base64
- Bl4=
- One's complement
- 63,905 (16-bit)
- Scientific notation
- 1.63 × 10³
- As a duration
- 1,630 s = 27 minutes, 10 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆
- Greek (Milesian)
- ͵αχλʹ
- Mayan (base 20)
- 𝋤·𝋡·𝋪
- Chinese
- 一千六百三十
- Chinese (financial)
- 壹仟陸佰參拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,630 = 4
- e — Euler's number (e)
- Digit 1,630 = 2
- φ — Golden ratio (φ)
- Digit 1,630 = 4
- √2 — Pythagoras's (√2)
- Digit 1,630 = 4
- ln 2 — Natural log of 2
- Digit 1,630 = 9
- γ — Euler-Mascheroni (γ)
- Digit 1,630 = 8
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1630, here are decompositions:
- 3 + 1627 = 1630
- 11 + 1619 = 1630
- 17 + 1613 = 1630
- 23 + 1607 = 1630
- 29 + 1601 = 1630
- 47 + 1583 = 1630
- 59 + 1571 = 1630
- 71 + 1559 = 1630
Showing the first eight; more decompositions exist.
UTF-8 encoding: D9 9E (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.94.
- Address
- 0.0.6.94
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.94
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,630 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G♯6 (1661.2 Hz, -33¢)
- Scientific pitch (C4 = 256 Hz): G♯6 (1625.5 Hz, +5¢)
- Baroque pitch (A4 = 415 Hz): A6 (1660 Hz, -32¢)
The digit sequence 1630 first appears in π at position 5,858 of the decimal expansion (the 5,858ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.