9090990909

Names of 9090990909

• Cardinal: 9090990909 can be written as Nine billion, ninety million, nine hundred ninety thousand, nine hundred nine.

Scientific notation

• Scientific notation: 9.090990909 × 10⁹

Factors of 9090990909

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 9162

Divisors of 9090990909

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 7 9 11 13 21 27 33 37 39 63 77 91 99 111 117 143 189 231 259 273 297 333 351 407 429 481 693 777 819 999 1001 1221 1287 1443 2079 2331 2457 2849 3003 3367 3663 3861 4329 5291 6993 8547 9009 9091 10101 10989 12987 15873 25641 27027 27273 30303 37037 47619 63637 76923 81819 90909 100001 111111 118183 142857 190911 245457 300003 333333 336367 354549 572733 700007 827281 900009 999999 1009101 1063647 1300013 1718199 2100021 2354569 2481843 2700027 3027303 3190941 3700037 3900039 4372771 6300063 7063707 7445529 9081909 9100091 11100111 11700117 13118313 18900189 21191121 22336587 25900259 27300273 30609397 33300333 35100351 39354939 48100481 63573363 77700777 81900819 91828191 99900999 118064817 144301443 233102331 245702457 275484573 336703367 432904329 699306993 826453719 1010110101 1298712987 3030330303 9090990909
• Sum of all divisors σ(n): 18573864960
• Sum of proper divisors (its aliquot sum) s(n): 9482874051
• 9090990909 is an abundant number, because the sum of its proper divisors (9482874051) is greater than itself. Its abundance is 391883142

Bases of 9090990909

• Binary: 1000011101110111011000001100111101₂
• Hexadecimal: 0x21DDD833D
• Base-36: 46CJHH9

Squares and roots of 9090990909

• 9090990909 squared (9090990909²) is 82646115707520646281
• 9090990909 cubed (9090990909³) is 751335086561232298270375659429
• The square root of 9090990909 is 95346.6879812823
• The cube root of 9090990909 is 2087.0702835895

Scales and comparisons

• 9,090,990,909 seconds is equal to 289 years, 3 weeks, 2 days, 19 hours, 15 minutes, 9 seconds.
• To count from 1 to 9,090,990,909 would take you about five hundred seventy-eight years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 9090990909 cubic inches would be around 173.9 feet tall.

Recreational maths with 9090990909

• 9090990909 is the same when its digits are reversed! That makes it a palindromic number.
• The number of decimal digits it has is: 10
• The sum of 9090990909's digits is 54
• More coming soon!