Number

844

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

Deficient Number Odious Number Pernicious Number Recamán's Sequence Year

Historical context — 844 AD

Calendar year

Year 844 (DCCCXLIV) was a leap year starting on Tuesday of the Julian calendar.

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Historical context — 844 BC

Decade

This article concerns the period 849 BC – 840 BC.

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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: Friday
January 1, 844
Ended on: Saturday
December 31, 844
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 840s
840–849
Century: 9th century
801–900
Millennium: 1st millennium
1–1000
Years ago: 1,182
1182 years before 2026.

In other calendars

Hebrew: 4604 / 4605 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 229 / 230 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Wood zodiac:Rat
Sexagenary cycle position 1 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1387 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 222 / 223 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 836 / 837 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 766 / 765 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 16
Digit product: 128
Digital root: 7
Palindrome: No
Bit width: 10 bits
Reversed: 448
Recamán's sequence: a(843) = 844
Square (n²): 712,336
Cube (n³): 601,211,584
Divisor count: 6
σ(n) — sum of divisors: 1,484
φ(n) — Euler's totient: 420
Sum of prime factors: 215

Primality

Prime factorization: 2 ² × 211

Nearest primes: 839 (−5) · 853 (+9)

Divisors & multiples

All divisors (6)

1 · 2 · 4 · 211 · 422 (half) · 844

Aliquot sum (sum of proper divisors): 640

Factor pairs (a × b = 844)

1 × 844

2 × 422

4 × 211

First multiples

844 · 1,688 (double) · 2,532 · 3,376 · 4,220 · 5,064 · 5,908 · 6,752 · 7,596 · 8,440

Sums & aliquot sequence

As consecutive integers: 102 + 103 + … + 109

Aliquot sequence: 844 → 640 → 890 → 730 → 602 → 454 → 230 → 202 → 104 → 106 → 56 → 64 → 63 → 41 → 1 → 0 — terminates at zero

Representations

In words: eight hundred forty-four
Ordinal: 844th
Roman numeral: DCCCXLIV
Binary: 1101001100
Octal: 1514
Hexadecimal: 0x34C
Base64: A0w=
One's complement: 64,691 (16-bit)

In other bases

ternary (3) 1011021

quaternary (4) 31030

quinary (5) 11334

senary (6) 3524

septenary (7) 2314

nonary (9) 1137

undecimal (11) 6a8

duodecimal (12) 5a4

tridecimal (13) 4cc

tetradecimal (14) 444

pentadecimal (15) 3b4

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
Greek (Milesian): ωμδʹ
Mayan (base 20): 𝋢·𝋢·𝋤
Chinese: 八百四十四
Chinese (financial): 捌佰肆拾肆

In other modern scripts

Eastern Arabic ٨٤٤ Devanagari ८४४ Bengali ৮৪৪ Tamil ௮௪௪ Thai ๘๔๔ Tibetan ༨༤༤ Khmer ៨៤៤ Lao ໘໔໔ Burmese ၈၄၄

Digit at this position in famous constants

π — Pi (π): Digit 844 = 1
e — Euler's number (e): Digit 844 = 4
φ — Golden ratio (φ): Digit 844 = 2
√2 — Pythagoras's (√2): Digit 844 = 2
ln 2 — Natural log of 2: Digit 844 = 0
γ — Euler-Mascheroni (γ): Digit 844 = 1

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 844, here are decompositions:

5 + 839 = 844
17 + 827 = 844
23 + 821 = 844
47 + 797 = 844
71 + 773 = 844
83 + 761 = 844
101 + 743 = 844
167 + 677 = 844

Showing the first eight; more decompositions exist.

Unicode codepoint

Combining Almost Equal To Above

U+034C

Non-spacing mark (Mn)

UTF-8 encoding: CD 8C (2 bytes).

Lookup U+034C on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00034C

RGB(0, 3, 76)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.76.

Address: 0.0.3.76
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.76

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

NANP area code 844

The number 844 is an active NANP area code (North American Numbering Plan).

Primary area: Toll-free
Region: (special)
Country: North America

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 844 ↗