Live analysis

9,998

9,998 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.).

9,998 (nine thousand nine hundred ninety-eight) is an even 4-digit number. It is a composite number with 4 divisors, and factors as 2 × 4,999. Written other ways, in hexadecimal, 0x270E.

Arithmetic Number Cube-Free Deficient Number Flippable Odious Number Pernicious Number Recamán's Sequence Semiprime Squarefree

Interestingness

★ ★ ★ ★ ☆

6 notable facts · grade B

9,986 9,987 9,988 9,989 9,990 9,991 9,992 9,993 9,994 9,995 9,996 9,997 9,998 9,999 10,000 10,001 10,002 10,003 10,004 10,005 10,006 10,007 10,008 10,009 10,010

less more

Properties

Parity: Even
Digit count: 4
Digit sum: 35
Digit product: 5,832
Digital root: 8
Palindrome: No
Bit width: 14 bits
Reversed: 8,999
Flips to (rotate 180°): 8,666
Recamán's sequence: a(7,219) = 9,998
Square (n²): 99,960,004
Cube (n³): 999,400,119,992
Divisor count: 4
σ(n) — sum of divisors: 15,000
φ(n) — Euler's totient: 4,998
Sum of prime factors: 5,001

Primality

Prime factorization: 2 × 4999

Nearest primes: 9,973 (−25) · 10,007 (+9)

Divisors & multiples

All divisors (4)

1 · 2 · 4999 (half) · 9998

Aliquot sum (sum of proper divisors): 5,002

Factor pairs (a × b = 9,998)

1 × 9998

2 × 4999

First multiples

9,998 · 19,996 (double) · 29,994 · 39,992 · 49,990 · 59,988 · 69,986 · 79,984 · 89,982 · 99,980

Sums & aliquot sequence

As consecutive integers: 2,498 + 2,499 + 2,500 + 2,501

Aliquot sequence: 9,998 → 5,002 → 2,810 → 2,266 → 1,478 → 742 → 554 → 280 → 440 → 640 → 890 → 730 → 602 → 454 → 230 → 202 → 104 — unresolved within range

Continued fraction of √n

√9,998 = [99; (1, 98, 1, 198)]

Period length 4 — the block in parentheses repeats forever.

Representations

In words: nine thousand nine hundred ninety-eight
Ordinal: 9998th
Binary: 10011100001110
Octal: 23416
Hexadecimal: 0x270E
Base64: Jw4=
One's complement: 55,537 (16-bit)
Scientific notation: 9.998 × 10³
As a duration: 9,998 s = 2 hours, 46 minutes, 38 seconds

In other bases

ternary (3) 111201022

quaternary (4) 2130032

quinary (5) 304443

senary (6) 114142

septenary (7) 41102

nonary (9) 14638

undecimal (11) 756a

duodecimal (12) 5952

tridecimal (13) 4721

tetradecimal (14) 3902

pentadecimal (15) 2e68

As an angle

9,998° = 27 × 360° + 278°

278° ≈ 4.852 rad

Compass bearing: W (west)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵θϡϟηʹ
Mayan (base 20): 𝋡·𝋤·𝋳·𝋲
Chinese: 九千九百九十八
Chinese (financial): 玖仟玖佰玖拾捌

In other modern scripts

Eastern Arabic ٩٩٩٨ Devanagari ९९९८ Bengali ৯৯৯৮ Tamil ௯௯௯௮ Thai ๙๙๙๘ Tibetan ༩༩༩༨ Khmer ៩៩៩៨ Lao ໙໙໙໘ Burmese ၉၉၉၈

Digit at this position in famous constants

π — Pi (π): Digit 9,998 = 5
e — Euler's number (e): Digit 9,998 = 6
φ — Golden ratio (φ): Digit 9,998 = 3
√2 — Pythagoras's (√2): Digit 9,998 = 8
ln 2 — Natural log of 2: Digit 9,998 = 5
γ — Euler-Mascheroni (γ): Digit 9,998 = 8

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 9998, here are decompositions:

31 + 9967 = 9998
67 + 9931 = 9998
97 + 9901 = 9998
127 + 9871 = 9998
139 + 9859 = 9998
181 + 9817 = 9998
211 + 9787 = 9998
229 + 9769 = 9998

Showing the first eight; more decompositions exist.

Unicode codepoint

✎

Lower Right Pencil

U+270E

Other symbol (So)

UTF-8 encoding: E2 9C 8E (3 bytes).

Lookup U+270E on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00270E

RGB(0, 39, 14)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.39.14.

Address: 0.0.39.14
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.39.14

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

Musical pitch

Heard as a frequency, 9,998 Hz is closest to:

Concert pitch (A4 = 440 Hz): D♯9 (9956.1 Hz, +7¢)
Scientific pitch (C4 = 256 Hz): D♯9 (9742 Hz, +45¢ — about midway to E9)
Baroque pitch (A4 = 415 Hz): E9 (9948.8 Hz, +9¢)

Position in π

The digit sequence 9998 first appears in π at position 765 of the decimal expansion (the 765ordinal-suffix:th digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 9998 on Pi Search ↗