28721139408

Names of 28721139408

• Cardinal: 28721139408 can be written as Twenty-eight billion, seven hundred twenty-one million, one hundred thirty-nine thousand, four hundred eight.

Scientific notation

• Scientific notation: 2.8721139408 × 10¹⁰

Factors of 28721139408

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 609

Divisors of 28721139408

• Number of divisors d(n): 400
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 24 26 27 31 36 39 48 52 54 62 72 78 81 93 104 108 117 124 127 144 156 162 186 208 216 234 248 254 279 312 324 351 372 381 403 432 433 468 496 508 558 624 648 702 744 762 806 837 866 936 1016 1053 1116 1143 1209 1296 1299 1404 1488 1524 1612 1651 1674 1732 1872 2032 2106 2232 2286 2418 2511 2598 2808 3048 3224 3302 3348 3429 3464 3627 3897 3937 4212 4464 4572 4836 4953 5022 5196 5616 5629 6096 6448 6604 6696 6858 6928 7254 7794 7874 8424 9144 9672 9906 10044 10287 10392 10881 11258 11691 11811 13208 13392 13423 13716 14508 14859 15588 15748 16848 16887 18288 19344 19812 20088 20574 20784 21762 22516 23382 23622 26416 26846 27432 29016 29718 31176 31496 32643 33774 35073 35433 39624 40176 40269 41148 43524 44577 45032 46764 47244 50661 51181 53692 54864 54991 58032 59436 62352 62992 65286 67548 70146 70866 79248 80538 82296 87048 89154 90064 93528 94488 101322 102362 106299 107384 109982 118872 120807 130572 133731 135096 140292 141732 151983 153543 161076 164592 164973 174096 174499 178308 187056 188976 202644 204724 212598 214768 219964 237744 241614 261144 267462 270192 280584 283464 303966 307086 318897 322152 329946 348998 356616 362421 405288 409448 425196 439928 455949 460629 483228 494919 522288 523497 534924 561168 566928 607932 614172 637794 644304 659892 697996 713232 714883 724842 810576 818896 850392 879856 911898 921258 966456 989838 1046994 1069848 1087263 1215864 1228344 1275588 1319784 1381887 1395992 1429766 1449684 1484757 1570491 1700784 1704721 1823796 1842516 1932912 1979676 2093988 2139696 2144649 2174526 2431728 2456688 2551176 2639568 2763774 2791984 2859532 2899368 2969514 3140982 3409442 3647592 3685032 3959352 4145661 4187976 4289298 4349052 4454271 4711473 5102352 5114163 5527548 5719064 5798736 5939028 6281964 6433947 6818884 7295184 7370064 7918704 8291322 8375952 8578596 8698104 8908542 9422946 10228326 11055096 11438128 11878056 12563928 12867894 13637768 14134419 15342489 16582644 17157192 17396208 17817084 18845892 19301841 20456652 22110192 22161373 23756112 25127856 25735788 27275536 28268838 30684978 33165288 34314384 35634168 37691784 38603682 40913304 44322746 46027467 51471576 56537676 57905523 61369956 66330576 66484119 71268336 75383568 77207364 81826608 88645492 92054934 102943152 113075352 115811046 122739912 132968238 138082401 154414728 177290984 184109868 199452357 226150704 231622092 245479824 265936476 276164802 308829456 354581968 368219736 398904714 463244184 531872952 552329604 598357071 736439472 797809428 926488368 1063745904 1104659208 1196714142 1595618856 1795071213 2209318416 2393428284 3191237712 3590142426 4786856568 7180284852 9573713136 14360569704 28721139408
• Sum of all divisors σ(n): 93352247296
• Sum of proper divisors (its aliquot sum) s(n): 64631107888
• 28721139408 is an abundant number, because the sum of its proper divisors (64631107888) is greater than itself. Its abundance is 35909968480

Bases of 28721139408

• Binary: 11010101111111010011100111011010000₂
• Hexadecimal: 0x6AFE9CED0
• Base-36: D6ZTP00

Squares and roots of 28721139408

• 28721139408 squared (28721139408²) is 824903848893770590464
• 28721139408 cubed (28721139408³) is 23692178442273751711487019405312
• The square root of 28721139408 is 169473.1229664455
• The cube root of 28721139408 is 3062.4374120835

Scales and comparisons

• 28,721,139,408 seconds is equal to 913 years, 12 weeks, 4 days, 14 hours, 16 minutes, 48 seconds.
• To count from 1 to 28,721,139,408 would take you about one thousand, eight hundred twenty-six 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 28721139408 cubic inches would be around 255.2 feet tall.

Recreational maths with 28721139408

• 28721139408 backwards is 80493112782
• The number of decimal digits it has is: 11
• The sum of 28721139408's digits is 45
• More coming soon!