Number

444

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

444 (four hundred forty-four) is an even 3-digit number. It is a composite number with 12 divisors, and factors as 2² × 3 × 37. Its proper divisors sum to 620, more than the number itself, making it an abundant number. Its digits read the same forwards and backwards, so it is a palindromic number. Written other ways, in Roman numerals it is CDXLIV and in binary, 110111100.

Abundant Number Cube-Free Evil Number Harshad / Niven Moran Number Palindrome Recamán's Sequence Refactorable Number Repdigit Semiperfect Number Unlucky Number Year

Interestingness

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9 notable facts · grade A

432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456

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Historical context — 444 AD

Calendar year

Year 444 (CDXLIV) was a leap year starting on Saturday of the Julian calendar.

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

Historical context — 444 BC

Calendar year

Year 444 BC was a year of the pre-Julian Roman calendar.

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

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: Friday
January 1, 444
Ended on: Saturday
December 31, 444
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 440s
440–449
Century: 5th century
401–500
Millennium: 1st millennium
1–1000
Years ago: 1,582
1582 years before 2026.

In other calendars

Hebrew: 4204 / 4205 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Wood zodiac:Monkey
Sexagenary cycle position 21 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 987 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 436 / 437 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 366 / 365 Saka
Indian national calendar; year starts in March.

Cultural significance

Chinese unlucky

Triple-death — even more avoided than 4 alone.

Sourced from Wikipedia (Numerology, Chinese numerology, Gematria, and per-culture articles).

Properties

Parity: Even
Digit count: 3
Digit sum: 12
Digit product: 64
Digital root: 3
Palindrome: Yes
Bit width: 9 bits
Recamán's sequence: a(4,755) = 444
Square (n²): 197,136
Cube (n³): 87,528,384
Divisor count: 12
σ(n) — sum of divisors: 1,064
φ(n) — Euler's totient: 144
Sum of prime factors: 44

Primality

Prime factorization: 2 ² × 3 × 37

Nearest primes: 443 (−1) · 449 (+5)

Divisors & multiples

All divisors (12)

1 · 2 · 3 · 4 · 6 · 12 · 37 · 74 · 111 · 148 · 222 (half) · 444

Aliquot sum (sum of proper divisors): 620

Factor pairs (a × b = 444)

1 × 444

2 × 222

3 × 148

4 × 111

6 × 74

12 × 37

First multiples

444 · 888 (double) · 1,332 · 1,776 · 2,220 · 2,664 · 3,108 · 3,552 · 3,996 · 4,440

Sums & aliquot sequence

As consecutive integers: 147 + 148 + 149 52 + 53 + … + 59 7 + 8 + … + 30

Aliquot sequence: 444 → 620 → 724 → 550 → 566 → 286 → 218 → 112 → 136 → 134 → 70 → 74 → 40 → 50 → 43 → 1 → 0 — terminates at zero

Continued fraction of √n

√444 = [21; (14, 42)]

Period length 2 — the block in parentheses repeats forever.

Representations

In words: four hundred forty-four
Ordinal: 444th
Roman numeral: CDXLIV
Binary: 110111100
Octal: 674
Hexadecimal: 0x1BC
Base64: Abw=
One's complement: 65,091 (16-bit)
Scientific notation: 4.44 × 10²
As a duration: 444 s = 7 minutes, 24 seconds

In other bases

ternary (3) 121110

quaternary (4) 12330

quinary (5) 3234

senary (6) 2020

septenary (7) 1203

nonary (9) 543

undecimal (11) 374

duodecimal (12) 310

tridecimal (13) 282

tetradecimal (14) 23a

pentadecimal (15) 1e9

Palindromic in base 13

As an angle

444° = 1 × 360° + 84°

84° ≈ 1.466 rad

Compass bearing: E (east)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
Greek (Milesian): υμδʹ
Mayan (base 20): 𝋡·𝋢·𝋤
Chinese: 四百四十四
Chinese (financial): 肆佰肆拾肆

In other modern scripts

Eastern Arabic ٤٤٤ Devanagari ४४४ Bengali ৪৪৪ Tamil ௪௪௪ Thai ๔๔๔ Tibetan ༤༤༤ Khmer ៤៤៤ Lao ໔໔໔ Burmese ၄၄၄

Digit at this position in famous constants

π — Pi (π): Digit 444 = 0
e — Euler's number (e): Digit 444 = 5
φ — Golden ratio (φ): Digit 444 = 1
√2 — Pythagoras's (√2): Digit 444 = 2
ln 2 — Natural log of 2: Digit 444 = 9
γ — Euler-Mascheroni (γ): Digit 444 = 3

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 444, here are decompositions:

5 + 439 = 444
11 + 433 = 444
13 + 431 = 444
23 + 421 = 444
43 + 401 = 444
47 + 397 = 444
61 + 383 = 444
71 + 373 = 444

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Capital Letter Tone Five

U+01BC

Uppercase letter (Lu)

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

Lookup U+01BC on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0001BC

RGB(0, 1, 188)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.188.

Address: 0.0.1.188
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.188

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

Musical pitch

Heard as a frequency, 444 Hz is closest to:

Concert pitch (A4 = 440 Hz): A4 (440 Hz, +16¢)
Scientific pitch (C4 = 256 Hz): A♯4 (456.1 Hz, -47¢ — about midway to A4)
Baroque pitch (A4 = 415 Hz): A♯4 (439.7 Hz, +17¢)