Number

626

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

Deficient Number Odious Number Palindrome Pernicious Number Recamán's Sequence Self Number Semiprime Squarefree Year

Historical context — 626 AD

Calendar year

Year 626 (DCXXVI) was a common year starting on Wednesday of the Julian calendar.

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Historical context — 626 BC

Calendar year

The year 626 BC was a year of the pre-Julian Roman calendar.

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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: Sunday
January 1, 626
Ended on: Sunday
December 31, 626
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 620s
620–629
Century: 7th century
601–700
Millennium: 1st millennium
1–1000
Years ago: 1,400
1400 years before 2026.

In other calendars

Hebrew: 4386 / 4387 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 4 / 5 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Fire zodiac:Dog
Sexagenary cycle position 23 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1169 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 4 / 5 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 618 / 619 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 548 / 547 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 14
Digit product: 72
Digital root: 5
Palindrome: Yes
Bit width: 10 bits
Recamán's sequence: a(8,888) = 626
Square (n²): 391,876
Cube (n³): 245,314,376
Divisor count: 4
σ(n) — sum of divisors: 942
φ(n) — Euler's totient: 312
Sum of prime factors: 315

Primality

Prime factorization: 2 × 313

Nearest primes: 619 (−7) · 631 (+5)

Divisors & multiples

All divisors (4)

1 · 2 · 313 (half) · 626

Aliquot sum (sum of proper divisors): 316

Factor pairs (a × b = 626)

1 × 626

2 × 313

First multiples

626 · 1,252 (double) · 1,878 · 2,504 · 3,130 · 3,756 · 4,382 · 5,008 · 5,634 · 6,260

Sums & aliquot sequence

As a sum of two squares: 1² + 25²

As consecutive integers: 155 + 156 + 157 + 158

Aliquot sequence: 626 → 316 → 244 → 190 → 170 → 154 → 134 → 70 → 74 → 40 → 50 → 43 → 1 → 0 — terminates at zero

Representations

In words: six hundred twenty-six
Ordinal: 626th
Roman numeral: DCXXVI
Binary: 1001110010
Octal: 1162
Hexadecimal: 0x272
Base64: AnI=
One's complement: 64,909 (16-bit)

In other bases

ternary (3) 212012

quaternary (4) 21302

quinary (5) 10001

senary (6) 2522

septenary (7) 1553

nonary (9) 765

undecimal (11) 51a

duodecimal (12) 442

tridecimal (13) 392

tetradecimal (14) 32a

pentadecimal (15) 2bb

Historical numeral systems

Babylonian (base 60): 𒌋 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): χκϛʹ
Mayan (base 20): 𝋡·𝋫·𝋦
Chinese: 六百二十六
Chinese (financial): 陸佰貳拾陸

In other modern scripts

Eastern Arabic ٦٢٦ Devanagari ६२६ Bengali ৬২৬ Tamil ௬௨௬ Thai ๖๒๖ Tibetan ༦༢༦ Khmer ៦២៦ Lao ໖໒໖ Burmese ၆၂၆

Digit at this position in famous constants

π — Pi (π): Digit 626 = 7
e — Euler's number (e): Digit 626 = 8
φ — Golden ratio (φ): Digit 626 = 7
√2 — Pythagoras's (√2): Digit 626 = 4
ln 2 — Natural log of 2: Digit 626 = 5
γ — Euler-Mascheroni (γ): Digit 626 = 1

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 626, here are decompositions:

7 + 619 = 626
13 + 613 = 626
19 + 607 = 626
79 + 547 = 626
103 + 523 = 626
127 + 499 = 626
139 + 487 = 626
163 + 463 = 626

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Small Letter N With Left Hook

U+0272

Lowercase letter (Ll)

UTF-8 encoding: C9 B2 (2 bytes).

Lookup U+0272 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000272

RGB(0, 2, 114)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.114.

Address: 0.0.2.114
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.114

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

NANP area code 626

The number 626 is an active NANP area code (North American Numbering Plan).

Primary area: San Gabriel Valley / Pasadena
Region: California
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.

Look up area code 626 ↗