385
385 is a composite number, odd, a calendar year.
385 (three hundred eighty-five) is an odd 3-digit number. It is a composite number with 8 divisors, and factors as 5 × 7 × 11. Written other ways, in Roman numerals it is CCCLXXXV and in binary, 110000001.
Interestingness
Historical context — 385 AD
Calendar year
Year 385 (CCCLXXXV) was a common year starting on Wednesday of the Julian calendar.
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Historical context — 385 BC
Calendar year
Year 385 BC was a year of the pre-Julian Roman calendar.
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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, 385
- Ended on
-
Tuesday
December 31, 385
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
380s
380–389
- Century
-
4th century
301–400
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,641
1641 years before 2026.
In other calendars
- Hebrew
-
4145 / 4146 AM
Rosh Hashanah falls in September/October.
- Chinese
-
Year of the zodiac:Wood zodiac:Rooster
Sexagenary cycle position 22 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
928 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
377 / 378 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
307 / 306 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 5 × 7 × 11
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√385 = [19; (1, 1, 1, 1, 1, 3, 1, 2, 1, 3, 1, 1, 1, 1, 1, 38)]
Period length 16 — the block in parentheses repeats forever.
Representations
- In words
- three hundred eighty-five
- Ordinal
- 385th
- Roman numeral
- CCCLXXXV
- Binary
- 110000001
- Octal
- 601
- Hexadecimal
- 0x181
- Base64
- AYE=
- One's complement
- 65,150 (16-bit)
- Scientific notation
- 3.85 × 10²
- As a duration
- 385 s = 6 minutes, 25 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- τπεʹ
- Mayan (base 20)
- 𝋳·𝋥
- Chinese
- 三百八十五
- Chinese (financial)
- 參佰捌拾伍
Digit at this position in famous constants
- π — Pi (π)
- Digit 385 = 4
- e — Euler's number (e)
- Digit 385 = 0
- φ — Golden ratio (φ)
- Digit 385 = 0
- √2 — Pythagoras's (√2)
- Digit 385 = 4
- ln 2 — Natural log of 2
- Digit 385 = 7
- γ — Euler-Mascheroni (γ)
- Digit 385 = 1
Also seen as
UTF-8 encoding: C6 81 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.129.
- Address
- 0.0.1.129
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.1.129
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 385 is an active NANP area code (North American Numbering Plan).
- Primary area
- Salt Lake City
- Region
- Utah
- Country
- United States
Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.
Heard as a frequency, 385 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G4 (392 Hz, -31¢)
- Scientific pitch (C4 = 256 Hz): G4 (383.6 Hz, +6¢)
- Baroque pitch (A4 = 415 Hz): G♯4 (391.7 Hz, -30¢)
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.