1218131838

Names of 1218131838

• Cardinal: 1218131838 can be written as One billion, two hundred eighteen million, one hundred thirty-one thousand, eight hundred thirty-eight.

Scientific notation

• Scientific notation: 1.218131838 × 10⁹

Factors of 1218131838

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 966

Divisors of 1218131838

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 6 7 9 11 14 17 18 19 21 22 27 33 34 38 42 51 54 57 63 66 77 99 102 114 119 126 133 153 154 171 187 189 198 209 231 238 266 297 306 323 342 357 374 378 399 418 459 462 513 561 594 627 646 693 714 798 907 918 969 1026 1071 1122 1197 1254 1309 1386 1463 1683 1814 1881 1938 2079 2142 2261 2394 2618 2721 2907 2926 3213 3366 3553 3591 3762 3927 4158 4389 4522 5049 5442 5643 5814 6349 6426 6783 7106 7182 7854 8163 8721 8778 9977 10098 10659 11286 11781 12698 13167 13566 15419 16326 17233 17442 19047 19954 20349 21318 23562 24489 24871 26334 29931 30838 31977 34466 35343 38094 39501 40698 46257 48978 49742 51699 57141 59862 61047 63954 69839 70686 74613 79002 89793 92514 95931 103398 107933 114282 120631 122094 138771 139678 149226 155097 169609 171423 179586 189563 191862 209517 215866 223839 241262 269379 277542 292961 310194 323799 339218 342846 361893 379126 416313 419034 447678 465291 508827 538758 568689 585922 628551 647598 671517 723786 832626 878883 930582 971397 1017654 1085679 1137378 1187263 1257102 1326941 1343034 1526481 1706067 1757766 1885653 1942794 2050727 2171358 2374526 2636649 2653882 2914191 3052962 3222571 3257037 3412134 3561789 3771306 3980823 4101454 4579443 5118201 5273298 5828382 6152181 6445142 6514074 7123578 7909947 7961646 9158886 9667713 10236402 10685367 11942469 12304362 15819894 18456543 19335426 21370734 22557997 23884938 29003139 32056101 35827407 36913086 45115994 55369629 58006278 64112202 67673991 71654814 87009417 110739258 135347982 174018834 203021973 406043946 609065919 1218131838
• Sum of all divisors σ(n): 3765657600
• Sum of proper divisors (its aliquot sum) s(n): 2547525762
• 1218131838 is an abundant number, because the sum of its proper divisors (2547525762) is greater than itself. Its abundance is 1329393924

Bases of 1218131838

• Binary: 1001000100110110011011101111110₂
• Hexadecimal: 0x489B377E
• Base-36: K58SJI

Squares and roots of 1218131838

• 1218131838 squared (1218131838²) is 1483845174749258244
• 1218131838 cubed (1218131838³) is 1807519050024745133900372472
• The square root of 1218131838 is 34901.7454864367
• The cube root of 1218131838 is 1067.9840453367

Scales and comparisons

• 1,218,131,838 seconds is equal to 38 years, 38 weeks, 17 hours, 57 minutes, 18 seconds.
• To count from 1 to 1,218,131,838 would take you about seventy-seven 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 1218131838 cubic inches would be around 89 feet tall.

Recreational maths with 1218131838

• 1218131838 backwards is 8381318121
• The number of decimal digits it has is: 10
• The sum of 1218131838's digits is 36
• More coming soon!