368
368 is a composite number, even, a calendar year.
368 (three hundred sixty-eight) is an even 3-digit number. It is a composite number with 10 divisors, and factors as 2⁴ × 23. Its proper divisors sum to 376, more than the number itself, making it an abundant number. Written other ways, in Roman numerals it is CCCLXVIII and in binary, 101110000.
Interestingness
Historical context — 368 AD
Calendar year
Year 368 (CCCLXVIII) was a leap year starting on Tuesday of the Julian calendar.
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Historical context — 368 BC
Calendar year
Year 368 BC was a year of the pre-Julian Roman calendar.
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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
-
Monday
January 1, 368
- Ended on
-
Tuesday
December 31, 368
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
360s
360–369
- Century
-
4th century
301–400
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,658
1658 years before 2026.
In other calendars
- Hebrew
-
4128 / 4129 AM
Rosh Hashanah falls in September/October.
- 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
-
911 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Ethiopian
-
360 / 361 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
290 / 289 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 4 × 23
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√368 = [19; (5, 2, 5, 38)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- three hundred sixty-eight
- Ordinal
- 368th
- Roman numeral
- CCCLXVIII
- Binary
- 101110000
- Octal
- 560
- Hexadecimal
- 0x170
- Base64
- AXA=
- One's complement
- 65,167 (16-bit)
- Scientific notation
- 3.68 × 10²
- As a duration
- 368 s = 6 minutes, 8 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- τξηʹ
- Mayan (base 20)
- 𝋲·𝋨
- Chinese
- 三百六十八
- Chinese (financial)
- 參佰陸拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 368 = 5
- e — Euler's number (e)
- Digit 368 = 7
- φ — Golden ratio (φ)
- Digit 368 = 5
- √2 — Pythagoras's (√2)
- Digit 368 = 2
- ln 2 — Natural log of 2
- Digit 368 = 1
- γ — Euler-Mascheroni (γ)
- Digit 368 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 368, here are decompositions:
- 19 + 349 = 368
- 31 + 337 = 368
- 37 + 331 = 368
- 61 + 307 = 368
- 97 + 271 = 368
- 127 + 241 = 368
- 139 + 229 = 368
- 157 + 211 = 368
Showing the first eight; more decompositions exist.
UTF-8 encoding: C5 B0 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.112.
- Address
- 0.0.1.112
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.1.112
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 368 is an active NANP area code (North American Numbering Plan).
- Primary area
- Statewide
- Region
- Alberta
- Country
- Canada
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, 368 Hz is closest to:
- Concert pitch (A4 = 440 Hz): F♯4 (370 Hz, -9¢)
- Scientific pitch (C4 = 256 Hz): F♯4 (362 Hz, +28¢)
- Baroque pitch (A4 = 415 Hz): G4 (369.7 Hz, -8¢)
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.