Number

440

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

Abundant Number Gapful Number Happy Number Harshad / Niven Odious Number Pernicious Number Practical Number Recamán's Sequence Semiperfect Number Year

Historical context — 440 AD

Calendar year

Year 440 (CDXL) was a leap year starting on Monday of the Julian calendar.

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

Historical context — 440 BC

Calendar year

Year 440 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: Leap year
Divisible by 4 and not by 100; February has 29 days.
Days in year: 366
ISO weeks: 52
Started on: Sunday
January 1, 440
Ended on: Monday
December 31, 440
Friday the 13ths: 3
3 Friday the 13ths this year.
Decade: 440s
440–449
Century: 5th century
401–500
Millennium: 1st millennium
1–1000
Years ago: 1,586
1586 years before 2026.

In other calendars

Hebrew: 4200 / 4201 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Dragon
Sexagenary cycle position 17 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 983 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 432 / 433 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 362 / 361 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 8
Digit product: 0
Digital root: 8
Palindrome: No
Bit width: 9 bits
Reversed: 44
Recamán's sequence: a(4,763) = 440
Square (n²): 193,600
Cube (n³): 85,184,000
Divisor count: 16
σ(n) — sum of divisors: 1,080
φ(n) — Euler's totient: 160
Sum of prime factors: 22

Primality

Prime factorization: 2 ³ × 5 × 11

Nearest primes: 439 (−1) · 443 (+3)

Divisors & multiples

All divisors (16)

1 · 2 · 4 · 5 · 8 · 10 · 11 · 20 · 22 · 40 · 44 · 55 · 88 · 110 · 220 (half) · 440

Aliquot sum (sum of proper divisors): 640

Factor pairs (a × b = 440)

1 × 440

2 × 220

4 × 110

5 × 88

8 × 55

10 × 44

11 × 40

20 × 22

First multiples

440 · 880 (double) · 1,320 · 1,760 · 2,200 · 2,640 · 3,080 · 3,520 · 3,960 · 4,400

Sums & aliquot sequence

As consecutive integers: 86 + 87 + 88 + 89 + 90 35 + 36 + … + 45 20 + 21 + … + 35

Aliquot sequence: 440 → 640 → 890 → 730 → 602 → 454 → 230 → 202 → 104 → 106 → 56 → 64 → 63 → 41 → 1 → 0 — terminates at zero

Representations

In words: four hundred forty
Ordinal: 440th
Roman numeral: CDXL
Binary: 110111000
Octal: 670
Hexadecimal: 0x1B8
Base64: Abg=
One's complement: 65,095 (16-bit)

In other bases

ternary (3) 121022

quaternary (4) 12320

quinary (5) 3230

senary (6) 2012

septenary (7) 1166

nonary (9) 538

undecimal (11) 370

duodecimal (12) 308

tridecimal (13) 27b

tetradecimal (14) 236

pentadecimal (15) 1e5

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
Greek (Milesian): υμʹ
Mayan (base 20): 𝋡·𝋢·𝋠
Chinese: 四百四十
Chinese (financial): 肆佰肆拾

In other modern scripts

Eastern Arabic ٤٤٠ Devanagari ४४० Bengali ৪৪০ Tamil ௪௪௦ Thai ๔๔๐ Tibetan ༤༤༠ Khmer ៤៤០ Lao ໔໔໐ Burmese ၄၄၀

Digit at this position in famous constants

π — Pi (π): Digit 440 = 7
e — Euler's number (e): Digit 440 = 4
φ — Golden ratio (φ): Digit 440 = 7
√2 — Pythagoras's (√2): Digit 440 = 2
ln 2 — Natural log of 2: Digit 440 = 6
γ — Euler-Mascheroni (γ): Digit 440 = 9

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 440, here are decompositions:

7 + 433 = 440
19 + 421 = 440
31 + 409 = 440
43 + 397 = 440
61 + 379 = 440
67 + 373 = 440
73 + 367 = 440
103 + 337 = 440

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Capital Letter Ezh Reversed

U+01B8

Uppercase letter (Lu)

UTF-8 encoding: C6 B8 (2 bytes).

Lookup U+01B8 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0001B8

RGB(0, 1, 184)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.184.

Address: 0.0.1.184
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.184

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

NANP area code 440

The number 440 is an active NANP area code (North American Numbering Plan).

Primary area: Eastern / Western suburbs of Cleveland
Region: Ohio
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 440 ↗

Possible US bank routing number

This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.

Routing number

000000440

Federal Reserve

United States Government

Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.

Look up on FedACH (official) ↗ Search Google for routing number 000000440 ↗