Live analysis

998,990

998,990 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.).

998,990 (nine hundred ninety-eight thousand nine hundred ninety) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 5 × 283 × 353. Written other ways, in hexadecimal, 0xF3E4E.

Arithmetic Number Cube-Free Deficient Number Flippable Odious Number Pernicious Number Squarefree

Interestingness

★ ★ ☆ ☆ ☆

4 notable facts · grade D

998,978 998,979 998,980 998,981 998,982 998,983 998,984 998,985 998,986 998,987 998,988 998,989 998,990 998,991 998,992 998,993 998,994 998,995 998,996 998,997 998,998 998,999 999,000 999,001 999,002

less more

Properties

Parity: Even
Digit count: 6
Digit sum: 44
Digit product: 0
Digital root: 8
Palindrome: No
Bit width: 20 bits
Reversed: 99,899
Flips to (rotate 180°): 66,866
Square (n²): 997,981,020,100
Cube (n³): 996,973,059,269,699,000
Divisor count: 16
σ(n) — sum of divisors: 1,809,648
φ(n) — Euler's totient: 397,056
Sum of prime factors: 643

Primality

Prime factorization: 2 × 5 × 283 × 353

Nearest primes: 998,989 (−1) · 999,007 (+17)

Divisors & multiples

All divisors (16)

1 · 2 · 5 · 10 · 283 · 353 · 566 · 706 · 1415 · 1765 · 2830 · 3530 · 99899 · 199798 · 499495 (half) · 998990

Aliquot sum (sum of proper divisors): 810,658

Factor pairs (a × b = 998,990)

1 × 998990

2 × 499495

5 × 199798

10 × 99899

283 × 3530

353 × 2830

566 × 1765

706 × 1415

First multiples

998,990 · 1,997,980 (double) · 2,996,970 · 3,995,960 · 4,994,950 · 5,993,940 · 6,992,930 · 7,991,920 · 8,990,910 · 9,989,900

Sums & aliquot sequence

As consecutive integers: 249,746 + 249,747 + 249,748 + 249,749 199,796 + 199,797 + 199,798 + 199,799 + 199,800 49,940 + 49,941 + … + 49,959 3,389 + 3,390 + … + 3,671

Aliquot sequence: 998,990 → 810,658 → 458,270 → 366,634 → 183,320 → 229,240 → 334,520 → 418,240 → 578,456 → 506,164 → 379,630 → 303,722 → 178,714 → 103,526 → 56,074 → 33,512 → 31,288 — unresolved within range

Continued fraction of √n

√998,990 = [999; (2, 48, 3, 1, 9, 1, 2, 1, 1, 58, 4, 1, 1, 6, 2, 1, 3, 3, 1, 2, 1, 3, 3, 1, …)]

Period length 40 — the block in parentheses repeats forever.

Representations

In words: nine hundred ninety-eight thousand nine hundred ninety
Ordinal: 998990th
Binary: 11110011111001001110
Octal: 3637116
Hexadecimal: 0xF3E4E
Base64: Dz5O
One's complement: 4,293,968,305 (32-bit)
Scientific notation: 9.9899 × 10⁵
As a duration: 998,990 s = 11 days, 13 hours, 29 minutes, 50 seconds

In other bases

ternary (3) 1212202100122

quaternary (4) 3303321032

quinary (5) 223431430

senary (6) 33224542

septenary (7) 11330336

nonary (9) 1782318

undecimal (11) 622613

duodecimal (12) 402152

tridecimal (13) 28c925

tetradecimal (14) 1c00c6

pentadecimal (15) 14aee5

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋
Egyptian hieroglyphic: 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
Greek (Milesian): ͵ϡϟηϡϟʹ
Chinese: 九十九萬八千九百九十
Chinese (financial): 玖拾玖萬捌仟玖佰玖拾

In other modern scripts

Eastern Arabic ٩٩٨٩٩٠ Devanagari ९९८९९० Bengali ৯৯৮৯৯০ Tamil ௯௯௮௯௯௦ Thai ๙๙๘๙๙๐ Tibetan ༩༩༨༩༩༠ Khmer ៩៩៨៩៩០ Lao ໙໙໘໙໙໐ Burmese ၉၉၈၉၉၀

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 998990, here are decompositions:

7 + 998983 = 998990
43 + 998947 = 998990
73 + 998917 = 998990
151 + 998839 = 998990
211 + 998779 = 998990
241 + 998749 = 998990
337 + 998653 = 998990
367 + 998623 = 998990

Showing the first eight; more decompositions exist.

Hex color

#0F3E4E

RGB(15, 62, 78)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.15.62.78.

Address: 0.15.62.78
Class: reserved
IPv4-mapped IPv6: ::ffff:0.15.62.78

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 998,990 and was likely granted around 1911.

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

Look up US998,990 on Google Patents ↗ Look up on USPTO ↗

Position in π

The digit sequence 998990 first appears in π at position 177,384 of the decimal expansion (the 177,384ordinal-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 998990 on Pi Search ↗