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999,940

999,940 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.).
Abundant Number Arithmetic Number Cube-Free Odious Number Pernicious Number Practical Number Semiperfect Number

Interestingness

★ ★ ☆ ☆ ☆
4 notable facts · grade D
999,928 999,929 999,930 999,931 999,932 999,933 999,934 999,935 999,936 999,937 999,938 999,939 999,940 999,941 999,942 999,943 999,944 999,945 999,946 999,947 999,948 999,949 999,950 999,951 999,952
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Properties

Parity
Even
Digit count
6
Digit sum
40
Digit product
0
Digital root
4
Palindrome
No
Bit width
20 bits
Reversed
49,999
Square (n²)
999,880,003,600
Cube (n³)
999,820,010,799,784,000
Divisor count
36
σ(n) — sum of divisors
2,243,556
φ(n) — Euler's totient
374,272
Sum of prime factors
216

Primality

Prime factorization: 2 2 × 5 × 17 2 × 173

Nearest primes: 999,931 (−9) · 999,953 (+13)

Divisors & multiples

All divisors (36)
1 · 2 · 4 · 5 · 10 · 17 · 20 · 34 · 68 · 85 · 170 · 173 · 289 · 340 · 346 · 578 · 692 · 865 · 1156 · 1445 · 1730 · 2890 · 2941 · 3460 · 5780 · 5882 · 11764 · 14705 · 29410 · 49997 · 58820 · 99994 · 199988 · 249985 · 499970 (half) · 999940
Aliquot sum (sum of proper divisors): 1,243,616
Factor pairs (a × b = 999,940)
1 × 999940
2 × 499970
4 × 249985
5 × 199988
10 × 99994
17 × 58820
20 × 49997
34 × 29410
68 × 14705
85 × 11764
170 × 5882
173 × 5780
289 × 3460
340 × 2941
346 × 2890
578 × 1730
692 × 1445
865 × 1156
First multiples
999,940 · 1,999,880 (double) · 2,999,820 · 3,999,760 · 4,999,700 · 5,999,640 · 6,999,580 · 7,999,520 · 8,999,460 · 9,999,400

Sums & aliquot sequence

As a sum of two squares: 126² + 992² = 178² + 984² = 306² + 952² = 448² + 894²
As consecutive integers: 199,986 + 199,987 + 199,988 + 199,989 + 199,990 124,989 + 124,990 + … + 124,996 58,812 + 58,813 + … + 58,828 24,979 + 24,980 + … + 25,018
Aliquot sequence: 999,940 → 1,243,616 → 1,428,088 → 1,271,192 → 1,450,408 → 1,269,122 → 639,934 → 319,970 → 351,034 → 179,174 → 92,554 → 80,822 → 64,330 → 68,150 → 65,770 → 52,634 → 26,320 — unresolved within range

Continued fraction of √n

√999,940 = [999; (1, 32, 3, 221, 1, 7, 1, 2, 1, 4, 2, 1, 1, 24, 10, 6, 7, 1, 1, 1, 5, 2, 1, 1, …)]

Period length 60 — the block in parentheses repeats forever.

Representations

In words
nine hundred ninety-nine thousand nine hundred forty
Ordinal
999940th
Binary
11110100001000000100
Octal
3641004
Hexadecimal
0xF4204
Base64
D0IE
One's complement
4,293,967,355 (32-bit)
Scientific notation
9.9994 × 10⁵
As a duration
999,940 s = 11 days, 13 hours, 45 minutes, 40 seconds
In other bases
ternary (3) 1212210122211
quaternary (4) 3310020010
quinary (5) 223444230
senary (6) 33233204
septenary (7) 11333164
nonary (9) 1783584
undecimal (11) 6232a7
duodecimal (12) 402804
tridecimal (13) 2901a6
tetradecimal (14) 1c05a4
pentadecimal (15) 14b42a

Historical numeral systems

Babylonian (base 60)
𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
Egyptian hieroglyphic
𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
Greek (Milesian)
͵ϡϟθϡμʹ
Chinese
九十九萬九千九百四十
Chinese (financial)
玖拾玖萬玖仟玖佰肆拾
In other modern scripts
Eastern Arabic ٩٩٩٩٤٠ Devanagari ९९९९४० Bengali ৯৯৯৯৪০ Tamil ௯௯௯௯௪௦ Thai ๙๙๙๙๔๐ Tibetan ༩༩༩༩༤༠ Khmer ៩៩៩៩៤០ Lao ໙໙໙໙໔໐ Burmese ၉၉၉၉၄၀

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 999940, here are decompositions:

  • 23 + 999917 = 999940
  • 131 + 999809 = 999940
  • 167 + 999773 = 999940
  • 191 + 999749 = 999940
  • 257 + 999683 = 999940
  • 269 + 999671 = 999940
  • 317 + 999623 = 999940
  • 419 + 999521 = 999940

Showing the first eight; more decompositions exist.

Hex color
#0F4204
RGB(15, 66, 4)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.15.66.4.

Address
0.15.66.4
Class
reserved
IPv4-mapped IPv6
::ffff:0.15.66.4

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 999,940 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 US999,940 on Google Patents ↗ Look up on USPTO ↗
Position in π

The digit sequence 999940 first appears in π at position 310,881 of the decimal expansion (the 310,881ordinal-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 999940 on Pi Search ↗