Live analysis

987,988

987,988 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.).

987,988 (nine hundred eighty-seven thousand nine hundred eighty-eight) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 23 × 10,739. Written other ways, in hexadecimal, 0xF1354.

Arithmetic Number Cube-Free Deficient Number Evil Number Recamán's Sequence

Interestingness

★ ☆ ☆ ☆ ☆

3 notable facts · grade F

987,976 987,977 987,978 987,979 987,980 987,981 987,982 987,983 987,984 987,985 987,986 987,987 987,988 987,989 987,990 987,991 987,992 987,993 987,994 987,995 987,996 987,997 987,998 987,999 988,000

less more

Properties

Parity: Even
Digit count: 6
Digit sum: 49
Digit product: 290,304
Digital root: 4
Palindrome: No
Bit width: 20 bits
Reversed: 889,789
Recamán's sequence: a(330,663) = 987,988
Square (n²): 976,120,288,144
Cube (n³): 964,395,131,242,814,272
Divisor count: 12
σ(n) — sum of divisors: 1,804,320
φ(n) — Euler's totient: 472,472
Sum of prime factors: 10,766

Primality

Prime factorization: 2 ² × 23 × 10739

Nearest primes: 987,983 (−5) · 987,991 (+3)

Divisors & multiples

All divisors (12)

1 · 2 · 4 · 23 · 46 · 92 · 10739 · 21478 · 42956 · 246997 · 493994 (half) · 987988

Aliquot sum (sum of proper divisors): 816,332

Factor pairs (a × b = 987,988)

1 × 987988

2 × 493994

4 × 246997

23 × 42956

46 × 21478

92 × 10739

First multiples

987,988 · 1,975,976 (double) · 2,963,964 · 3,951,952 · 4,939,940 · 5,927,928 · 6,915,916 · 7,903,904 · 8,891,892 · 9,879,880

Sums & aliquot sequence

As consecutive integers: 123,495 + 123,496 + … + 123,502 42,945 + 42,946 + … + 42,967 5,278 + 5,279 + … + 5,461

Aliquot sequence: 987,988 → 816,332 → 742,204 → 556,660 → 702,836 → 527,134 → 263,570 → 210,874 → 105,440 → 144,040 → 206,240 → 281,380 → 363,740 → 459,460 → 505,448 → 522,712 → 465,128 — unresolved within range

Continued fraction of √n

√987,988 = [993; (1, 40, 2, 2, 2, 13, 2, 1, 1, 2, 1, 17, 1, 2, 5, 1, 2, 1, 5, 2, 31, 10, 1, 1, …)]

Representations

In words: nine hundred eighty-seven thousand nine hundred eighty-eight
Ordinal: 987988th
Binary: 11110001001101010100
Octal: 3611524
Hexadecimal: 0xF1354
Base64: DxNU
One's complement: 4,293,979,307 (32-bit)
Scientific notation: 9.87988 × 10⁵
As a duration: 987,988 s = 11 days, 10 hours, 26 minutes, 28 seconds

In other bases

ternary (3) 1212012021011

quaternary (4) 3301031110

quinary (5) 223103423

senary (6) 33102004

septenary (7) 11253301

nonary (9) 1765234

undecimal (11) 615321

duodecimal (12) 3b7904

tridecimal (13) 287911

tetradecimal (14) 1ba0a8

pentadecimal (15) 147b0d

As an angle

987,988° = 2,744 × 360° + 148°

148° ≈ 2.583 rad

Compass bearing: SSE (south-southeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵ϡπζϡπηʹ
Chinese: 九十八萬七千九百八十八
Chinese (financial): 玖拾捌萬柒仟玖佰捌拾捌

In other modern scripts

Eastern Arabic ٩٨٧٩٨٨ Devanagari ९८७९८८ Bengali ৯৮৭৯৮৮ Tamil ௯௮௭௯௮௮ Thai ๙๘๗๙๘๘ Tibetan ༩༨༧༩༨༨ Khmer ៩៨៧៩៨៨ Lao ໙໘໗໙໘໘ Burmese ၉၈၇၉၈၈

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 987988, here are decompositions:

5 + 987983 = 987988
17 + 987971 = 987988
47 + 987941 = 987988
59 + 987929 = 987988
137 + 987851 = 987988
167 + 987821 = 987988
179 + 987809 = 987988
191 + 987797 = 987988

Showing the first eight; more decompositions exist.

Hex color

#0F1354

RGB(15, 19, 84)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.15.19.84.

Address: 0.15.19.84
Class: reserved
IPv4-mapped IPv6: ::ffff:0.15.19.84

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 987,988 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 US987,988 on Google Patents ↗ Look up on USPTO ↗

Position in π

The digit sequence 987988 first appears in π at position 129,651 of the decimal expansion (the 129,651ordinal-suffix:st 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 987988 on Pi Search ↗