9991908472

Names of 9991908472

• Cardinal: 9991908472 can be written as Nine billion, nine hundred ninety-one million, nine hundred eight thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 9.991908472 × 10⁹

Factors of 9991908472

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1861

Divisors of 9991908472

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 7 8 13 14 26 28 29 52 56 58 91 104 116 182 203 232 317 364 377 406 634 728 754 812 1268 1493 1508 1624 2219 2536 2639 2986 3016 4121 4438 5278 5972 8242 8876 9193 10451 10556 11944 16484 17752 18386 19409 20902 21112 28847 32968 36772 38818 41804 43297 57694 64351 73544 77636 83608 86594 115388 119509 128702 135863 155272 173188 230776 239018 257404 271726 303079 346376 473281 478036 514808 543452 562861 606158 836563 946562 956072 1086904 1125722 1212316 1673126 1893124 2251444 2424632 3312967 3346252 3786248 3940027 4502888 6152653 6625934 6692504 7880054 12305306 13251868 13725149 15760108 24610612 26503736 27450298 31520216 43068571 49221224 54900596 86137142 96076043 109801192 172274284 178426937 192152086 344548568 356853874 384304172 713707748 768608344 1248988559 1427415496 2497977118 4995954236 9991908472
• Sum of all divisors σ(n): 23944636800
• Sum of proper divisors (its aliquot sum) s(n): 13952728328
• 9991908472 is an abundant number, because the sum of its proper divisors (13952728328) is greater than itself. Its abundance is 3960819856

Bases of 9991908472

• Binary: 1001010011100100000110110001111000₂
• Hexadecimal: 0x253906C78
• Base-36: 4L8X9X4

Squares and roots of 9991908472

• 9991908472 squared (9991908472²) is 99838234912825374784
• 9991908472 cubed (9991908472³) is 997574505254986043760824770048
• The square root of 9991908472 is 99959.5341725841
• The cube root of 9991908472 is 2153.8534442775

Scales and comparisons

• 9,991,908,472 seconds is equal to 317 years, 37 weeks, 2 hours, 7 minutes, 52 seconds.
• To count from 1 to 9,991,908,472 would take you about six hundred thirty-five 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 9991908472 cubic inches would be around 179.5 feet tall.

Recreational maths with 9991908472

• 9991908472 backwards is 2748091999
• 9991908472 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 9991908472's digits is 58
• More coming soon!