Number

394

394 is a composite number, even, a calendar year.

Deficient Number Evil Number Recamán's Sequence Semiprime Squarefree Year

Historical context — 394 AD

Calendar year

Year 394 (CCCXCIV) was a common year starting on Sunday of the Julian calendar.

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Historical context — 394 BC

Calendar year

Year 394 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

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: Saturday
January 1, 394
Ended on: Saturday
December 31, 394
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 390s
390–399
Century: 4th century
301–400
Millennium: 1st millennium
1–1000
Years ago: 1,632
1632 years before 2026.

In other calendars

Hebrew: 4154 / 4155 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Wood zodiac:Horse
Sexagenary cycle position 31 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 937 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 386 / 387 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 316 / 315 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 16
Digit product: 108
Digital root: 7
Palindrome: No
Bit width: 9 bits
Reversed: 493
Recamán's sequence: a(2,464) = 394
Square (n²): 155,236
Cube (n³): 61,162,984
Divisor count: 4
σ(n) — sum of divisors: 594
φ(n) — Euler's totient: 196
Sum of prime factors: 199

Primality

Prime factorization: 2 × 197

Nearest primes: 389 (−5) · 397 (+3)

Divisors & multiples

All divisors (4)

1 · 2 · 197 (half) · 394

Aliquot sum (sum of proper divisors): 200

Factor pairs (a × b = 394)

1 × 394

2 × 197

First multiples

394 · 788 (double) · 1,182 · 1,576 · 1,970 · 2,364 · 2,758 · 3,152 · 3,546 · 3,940

Sums & aliquot sequence

As a sum of two squares: 13² + 15²

As consecutive integers: 97 + 98 + 99 + 100

Aliquot sequence: 394 → 200 → 265 → 59 → 1 → 0 — terminates at zero

Representations

In words: three hundred ninety-four
Ordinal: 394th
Roman numeral: CCCXCIV
Binary: 110001010
Octal: 612
Hexadecimal: 0x18A
Base64: AYo=
One's complement: 65,141 (16-bit)

In other bases

ternary (3) 112121

quaternary (4) 12022

quinary (5) 3034

senary (6) 1454

septenary (7) 1102

nonary (9) 477

undecimal (11) 329

duodecimal (12) 28a

tridecimal (13) 244

tetradecimal (14) 202

pentadecimal (15) 1b4

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
Greek (Milesian): τϟδʹ
Mayan (base 20): 𝋳·𝋮
Chinese: 三百九十四
Chinese (financial): 參佰玖拾肆

In other modern scripts

Eastern Arabic ٣٩٤ Devanagari ३९४ Bengali ৩৯৪ Tamil ௩௯௪ Thai ๓๙๔ Tibetan ༣༩༤ Khmer ៣៩៤ Lao ໓໙໔ Burmese ၃၉၄

Digit at this position in famous constants

π — Pi (π): Digit 394 = 1
e — Euler's number (e): Digit 394 = 9
φ — Golden ratio (φ): Digit 394 = 7
√2 — Pythagoras's (√2): Digit 394 = 8
ln 2 — Natural log of 2: Digit 394 = 8
γ — Euler-Mascheroni (γ): Digit 394 = 0

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 394, here are decompositions:

5 + 389 = 394
11 + 383 = 394
41 + 353 = 394
47 + 347 = 394
83 + 311 = 394
101 + 293 = 394
113 + 281 = 394
131 + 263 = 394

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Capital Letter D With Hook

U+018A

Uppercase letter (Lu)

UTF-8 encoding: C6 8A (2 bytes).

Lookup U+018A on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00018A

RGB(0, 1, 138)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.138.

Address: 0.0.1.138
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.138

Unspecified address (0.0.0.0/8) — "this network" placeholder.