30891999138

Names of 30891999138

• Cardinal: 30891999138 can be written as Thirty billion, eight hundred ninety-one million, nine hundred ninety-nine thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 3.0891999138 × 10¹⁰

Factors of 30891999138

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1100

Divisors of 30891999138

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 6 7 11 13 14 21 22 26 33 39 42 49 66 67 77 78 91 98 121 134 143 147 154 182 201 231 242 273 286 294 363 402 429 462 469 539 546 637 726 737 847 858 871 938 997 1001 1078 1274 1407 1474 1573 1617 1694 1742 1911 1994 2002 2211 2541 2613 2814 2991 3003 3146 3234 3283 3822 4422 4719 5082 5159 5226 5929 5982 6006 6097 6566 6979 7007 8107 9438 9581 9849 10318 10967 11011 11858 12194 12961 13958 14014 15477 16214 17787 18291 19162 19698 20937 21021 21934 22022 24321 25922 28743 30954 32901 33033 35574 36113 36582 38883 41874 42042 42679 48642 48853 56749 57486 65802 66066 66799 67067 72226 76769 77077 77766 85358 90727 97706 105391 108339 113498 120637 128037 133598 134134 142571 146559 153538 154154 170247 181454 200397 201201 210782 216678 230307 231231 241274 256074 272181 285142 293118 316173 340494 361911 397243 400794 402402 427713 460614 462462 467593 469469 537383 544362 632346 635089 723822 734789 737737 794486 844459 855426 868387 935186 938938 997997 1074766 1191729 1270178 1402779 1408407 1469578 1475474 1568281 1612149 1688918 1736774 1905267 1995994 2204367 2213211 2383458 2533377 2605161 2805558 2816814 2993991 3136562 3224298 3273151 3810534 4408734 4426422 4704843 5066754 5143523 5164159 5210322 5911213 5987982 6078709 6546302 6985979 8082679 9409686 9552257 9819453 10287046 10328318 10977967 11822426 12157418 13971958 15430569 15492477 16165358 17733639 18236127 19104514 19638906 20957937 21955934 24248037 28656771 30861138 30984954 32933901 35467278 36004661 36472254 41915874 42550963 48496074 56578753 57313542 65867802 66865799 72009322 76845769 85101926 105074827 108013983 113157506 127652889 133731598 153691538 169736259 200597397 210149654 216027966 230537307 255305778 315224481 339472518 396051271 401194794 461074614 468060593 630448962 735523789 792102542 936121186 1188153813 1404181779 1471047578 2206571367 2376307626 2808363558 4413142734 5148666523 10297333046 15445999569 30891999138
• Sum of all divisors σ(n): 86432133312
• Sum of proper divisors (its aliquot sum) s(n): 55540134174
• 30891999138 is an abundant number, because the sum of its proper divisors (55540134174) is greater than itself. Its abundance is 24648135036

Bases of 30891999138

• Binary: 11100110001010011100111111110100010₂
• Hexadecimal: 0x7314E7FA2
• Base-36: E6WAR36

Squares and roots of 30891999138

• 30891999138 squared (30891999138²) is 954315610742192743044
• 30891999138 cubed (30891999138³) is 29480717024427761758345103496072
• The square root of 30891999138 is 175761.1991822997
• The cube root of 30891999138 is 3137.7283235859

Scales and comparisons

• 30,891,999,138 seconds is equal to 982 years, 14 weeks, 6 hours, 52 minutes, 18 seconds.
• To count from 1 to 30,891,999,138 would take you about one thousand, nine hundred sixty-four 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 30891999138 cubic inches would be around 261.5 feet tall.

Recreational maths with 30891999138

• 30891999138 backwards is 83199919803
• The number of decimal digits it has is: 11
• The sum of 30891999138's digits is 60
• More coming soon!