9940438638

Names of 9940438638

• Cardinal: 9940438638 can be written as Nine billion, nine hundred forty million, four hundred thirty-eight thousand, six hundred thirty-eight.

Scientific notation

• Scientific notation: 9.940438638 × 10⁹

Factors of 9940438638

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 142

Divisors of 9940438638

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 6 9 13 18 26 27 39 53 54 71 78 106 117 142 159 213 234 318 351 426 477 639 689 702 923 954 1278 1378 1431 1846 1917 2067 2769 2809 2862 3763 3834 4134 5041 5538 5618 6201 7526 8307 8427 10082 11289 12402 15123 16614 16854 18603 22578 24921 25281 30246 33867 36517 37206 45369 48919 49842 50562 65533 67734 73034 75843 90738 97838 101601 109551 131066 136107 146757 151686 196599 199439 203202 219102 267173 272214 293514 328653 393198 398878 440271 534346 589797 598317 657306 801519 880542 985959 1179594 1196634 1320813 1603038 1769391 1794951 1971918 2404557 2592707 2641626 3473249 3538782 3589902 4809114 5185414 5384853 6946498 7213671 7778121 10419747 10769706 14160169 14427342 15556242 20839494 23334363 28320338 31259241 42480507 46668726 62518482 70003089 84961014 93777723 127441521 140006178 184082197 187555446 254883042 368164394 382324563 552246591 764649126 1104493182 1656739773 3313479546 4970219319 9940438638
• Sum of all divisors σ(n): 24592711920
• Sum of proper divisors (its aliquot sum) s(n): 14652273282
• 9940438638 is an abundant number, because the sum of its proper divisors (14652273282) is greater than itself. Its abundance is 4711834644

Bases of 9940438638

• Binary: 1001010000011111110000111001101110₂
• Hexadecimal: 0x2507F0E6E
• Base-36: 4KEA3JI

Squares and roots of 9940438638

• 9940438638 squared (9940438638²) is 98812320315843295044
• 9940438638 cubed (9940438638³) is 982237806778041053608611510072
• The square root of 9940438638 is 99701.7484199751
• The cube root of 9940438638 is 2150.1488008065

Scales and comparisons

• 9,940,438,638 seconds is equal to 316 years, 3 weeks, 6 days, 8 hours, 57 minutes, 18 seconds.
• To count from 1 to 9,940,438,638 would take you about six hundred thirty-two 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 9940438638 cubic inches would be around 179.2 feet tall.

Recreational maths with 9940438638

• 9940438638 backwards is 8368340499
• 9940438638 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 9940438638's digits is 54
• More coming soon!