Live analysis

491,440

491,440 is a composite number, even.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

491,440 (four hundred ninety-one thousand four hundred forty) is an even 6-digit number. It is a composite number with 20 divisors, and factors as 2⁴ × 5 × 6,143. Its proper divisors sum to 651,344, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x77FB0.

Abundant Number Gapful Number Happy Number Odious Number Pernicious Number Refactorable Number Semiperfect Number

Interestingness

★ ★ ☆ ☆ ☆

4 notable facts · grade D

491,428 491,429 491,430 491,431 491,432 491,433 491,434 491,435 491,436 491,437 491,438 491,439 491,440 491,441 491,442 491,443 491,444 491,445 491,446 491,447 491,448 491,449 491,450 491,451 491,452

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Properties

Parity: Even
Digit count: 6
Digit sum: 22
Digit product: 0
Digital root: 4
Palindrome: No
Bit width: 19 bits
Reversed: 44,194
Square (n²): 241,513,273,600
Cube (n³): 118,689,283,177,984,000
Divisor count: 20
σ(n) — sum of divisors: 1,142,784
φ(n) — Euler's totient: 196,544
Sum of prime factors: 6,156

Primality

Prime factorization: 2 ⁴ × 5 × 6143

Nearest primes: 491,429 (−11) · 491,461 (+21)

Divisors & multiples

All divisors (20)

1 · 2 · 4 · 5 · 8 · 10 · 16 · 20 · 40 · 80 · 6143 · 12286 · 24572 · 30715 · 49144 · 61430 · 98288 · 122860 · 245720 (half) · 491440

Aliquot sum (sum of proper divisors): 651,344

Factor pairs (a × b = 491,440)

1 × 491440

2 × 245720

4 × 122860

5 × 98288

8 × 61430

10 × 49144

16 × 30715

20 × 24572

40 × 12286

80 × 6143

First multiples

491,440 · 982,880 (double) · 1,474,320 · 1,965,760 · 2,457,200 · 2,948,640 · 3,440,080 · 3,931,520 · 4,422,960 · 4,914,400

Sums & aliquot sequence

As consecutive integers: 98,286 + 98,287 + 98,288 + 98,289 + 98,290 15,342 + 15,343 + … + 15,373 2,992 + 2,993 + … + 3,151

Aliquot sequence: 491,440 → 651,344 → 610,666 → 457,238 → 228,622 → 114,314 → 60,154 → 34,886 → 17,446 → 13,802 → 7,414 → 4,754 → 2,380 → 3,668 → 3,724 → 4,256 → 5,824 — unresolved within range

Continued fraction of √n

√491,440 = [701; (35, 1, 18, 1, 3, 2, 4, 15, 1, 1, 8, 3, 3, 4, 1, 1, 4, 2, 8, 1, 5, 21, 2, 2, …)]

Representations

In words: four hundred ninety-one thousand four hundred forty
Ordinal: 491440th
Binary: 1110111111110110000
Octal: 1677660
Hexadecimal: 0x77FB0
Base64: B3+w
One's complement: 4,294,475,855 (32-bit)
Scientific notation: 4.9144 × 10⁵
As a duration: 491,440 s = 5 days, 16 hours, 30 minutes, 40 seconds

In other bases

ternary (3) 220222010111

quaternary (4) 1313332300

quinary (5) 111211230

senary (6) 14311104

septenary (7) 4114525

nonary (9) 828114

undecimal (11) 306254

duodecimal (12) 1b8494

tridecimal (13) 1428c1

tetradecimal (14) cb14c

pentadecimal (15) 9a92a

As an angle

491,440° = 1,365 × 360° + 40°

40° ≈ 0.698 rad

Compass bearing: NE (northeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 𒌋𒌋𒌋𒌋
Egyptian hieroglyphic: 𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
Greek (Milesian): ͵υϟαυμʹ
Chinese: 四十九萬一千四百四十
Chinese (financial): 肆拾玖萬壹仟肆佰肆拾

In other modern scripts

Eastern Arabic ٤٩١٤٤٠ Devanagari ४९१४४० Bengali ৪৯১৪৪০ Tamil ௪௯௧௪௪௦ Thai ๔๙๑๔๔๐ Tibetan ༤༩༡༤༤༠ Khmer ៤៩១៤៤០ Lao ໔໙໑໔໔໐ Burmese ၄၉၁၄၄၀

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 491440, here are decompositions:

11 + 491429 = 491440
17 + 491423 = 491440
23 + 491417 = 491440
83 + 491357 = 491440
101 + 491339 = 491440
107 + 491333 = 491440
113 + 491327 = 491440
167 + 491273 = 491440

Showing the first eight; more decompositions exist.

Hex color

#077FB0

RGB(7, 127, 176)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.7.127.176.

Address: 0.7.127.176
Class: reserved
IPv4-mapped IPv6: ::ffff:0.7.127.176

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

Possible US patent number

This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 491,440 and was likely granted around 1893.

Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.

Look up US491,440 on Google Patents ↗ Look up on USPTO ↗