938
938 is a composite number, even, a calendar year.
938 (nine hundred thirty-eight) is an even 3-digit number. It is a composite number with 8 divisors, and factors as 2 × 7 × 67. Written other ways, in Roman numerals it is CMXXXVIII and in binary, 1110101010.
Interestingness
Historical context — 938 AD
Calendar year
Year 938 (CMXXXVIII) was a common year starting on Monday of the Julian calendar.
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Historical context — 938 BC
Decade
The 930s BC is a decade that lasted from 939 BC to 930 BC.
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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
-
Wednesday
January 1, 938
- Ended on
-
Wednesday
December 31, 938
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
930s
930–939
- Century
-
10th century
901–1000
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,088
1088 years before 2026.
In other calendars
- Hebrew
-
4698 / 4699 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
326 / 327 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Dog
Sexagenary cycle position 35 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1481 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
316 / 317 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
930 / 931 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
860 / 859 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 7 × 67
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√938 = [30; (1, 1, 1, 2, 8, 2, 1, 1, 1, 60)]
Period length 10 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred thirty-eight
- Ordinal
- 938th
- Roman numeral
- CMXXXVIII
- Binary
- 1110101010
- Octal
- 1652
- Hexadecimal
- 0x3AA
- Base64
- A6o=
- One's complement
- 64,597 (16-bit)
- Scientific notation
- 9.38 × 10²
- As a duration
- 938 s = 15 minutes, 38 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ϡληʹ
- Mayan (base 20)
- 𝋢·𝋦·𝋲
- Chinese
- 九百三十八
- Chinese (financial)
- 玖佰參拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 938 = 7
- e — Euler's number (e)
- Digit 938 = 2
- φ — Golden ratio (φ)
- Digit 938 = 8
- √2 — Pythagoras's (√2)
- Digit 938 = 9
- ln 2 — Natural log of 2
- Digit 938 = 1
- γ — Euler-Mascheroni (γ)
- Digit 938 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 938, here are decompositions:
- 19 + 919 = 938
- 31 + 907 = 938
- 61 + 877 = 938
- 79 + 859 = 938
- 109 + 829 = 938
- 127 + 811 = 938
- 151 + 787 = 938
- 181 + 757 = 938
Showing the first eight; more decompositions exist.
UTF-8 encoding: CE AA (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.170.
- Address
- 0.0.3.170
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.3.170
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 938 is an active NANP area code (North American Numbering Plan).
- Primary area
- Huntsville
- Region
- Alabama
- 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, 938 Hz is closest to:
- Concert pitch (A4 = 440 Hz): A♯5 (932.3 Hz, +11¢)
- Scientific pitch (C4 = 256 Hz): A♯5 (912.3 Hz, +48¢ — about midway to B5)
- Baroque pitch (A4 = 415 Hz): B5 (931.6 Hz, +12¢)
On an ingredients label, E938 is Argon, a glazing agent, gas or sweetener.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.