18281971728

Names of 18281971728

• Cardinal: 18281971728 can be written as Eighteen billion, two hundred eighty-one million, nine hundred seventy-one thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.8281971728 × 10¹⁰

Factors of 18281971728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 288

Divisors of 18281971728

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 23 24 27 36 37 46 48 54 69 72 74 92 108 111 138 144 148 184 207 216 222 223 276 296 333 368 414 432 444 446 552 592 621 666 669 828 851 888 892 999 1104 1242 1332 1338 1656 1702 1776 1784 1998 2007 2484 2553 2664 2676 3312 3404 3568 3996 4014 4968 5106 5129 5328 5352 6021 6808 7659 7992 8028 8251 9936 10212 10258 10704 12042 13616 15318 15387 15984 16056 16502 20424 20516 22977 24084 24753 30636 30774 32112 33004 40848 41032 45954 46161 48168 49506 49729 61272 61548 66008 74259 82064 91908 92322 96336 99012 99458 122544 123096 132016 138483 148518 149187 183816 184644 189773 198024 198916 222777 246192 276966 297036 298374 367632 369288 379546 396048 397832 445554 447561 553932 569319 594072 596748 738576 759092 795664 891108 895122 1107864 1138638 1143767 1188144 1193496 1342683 1518184 1707957 1782216 1790244 1839973 2215728 2277276 2287534 2386992 2685366 3036368 3415914 3431301 3564432 3580488 3679946 4554552 4575068 5123871 5370732 5519919 6831828 6862602 7160976 7359892 9109104 9150136 10247742 10293903 10741464 11039838 13663656 13725204 14719784 16559757 18300272 20495484 20587806 21482928 22079676 27327312 27450408 29439568 30881709 33119514 40990968 41175612 42319379 44159352 49679271 54900816 61763418 66239028 81981936 82351224 84638758 88318704 99358542 123526836 126958137 132478056 164702448 169277516 198717084 247053672 253916274 264956112 338555032 380874411 397434168 494107344 507832548 677110064 761748822 794868336 1015665096 1142623233 1523497644 2031330192 2285246466 3046995288 4570492932 6093990576 9140985864 18281971728
• Sum of all divisors σ(n): 56490848640
• Sum of proper divisors (its aliquot sum) s(n): 38208876912
• 18281971728 is an abundant number, because the sum of its proper divisors (38208876912) is greater than itself. Its abundance is 19926905184

Bases of 18281971728

• Binary: 10001000001101100001100000000010000₂
• Hexadecimal: 0x441B0C010
• Base-36: 8ECM3O0

Squares and roots of 18281971728

• 18281971728 squared (18281971728²) is 334230490263391305984
• 18281971728 cubed (18281971728³) is 6110392373630899129400485220352
• The square root of 18281971728 is 135210.8417546463
• The cube root of 18281971728 is 2634.3552740205

Scales and comparisons

• 18,281,971,728 seconds is equal to 581 years, 16 weeks, 21 hours, 28 minutes, 48 seconds.
• To count from 1 to 18,281,971,728 would take you about one thousand, one hundred sixty-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 18281971728 cubic inches would be around 219.5 feet tall.

Recreational maths with 18281971728

• 18281971728 backwards is 82717918281
• 18281971728 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 18281971728's digits is 54
• More coming soon!