30781513840

Names of 30781513840

• Cardinal: 30781513840 can be written as Thirty billion, seven hundred eighty-one million, five hundred thirteen thousand, eight hundred forty.

Scientific notation

• Scientific notation: 3.078151384 × 10¹⁰

Factors of 30781513840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 13547

Divisors of 30781513840

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 4 5 7 8 10 11 14 16 20 22 28 35 40 44 49 53 55 56 70 77 80 88 98 106 110 112 140 154 176 196 212 220 245 265 280 308 371 385 392 424 440 490 530 539 560 583 616 742 770 784 848 880 980 1060 1078 1166 1232 1484 1540 1855 1960 2120 2156 2332 2597 2695 2915 2968 3080 3710 3920 4081 4240 4312 4664 5194 5390 5830 5936 6160 7420 8162 8624 9328 10388 10780 11660 12985 13469 14840 16324 20405 20776 21560 23320 25970 26938 28567 29680 32648 40810 41552 43120 46640 51940 53876 57134 65296 67345 81620 94283 103880 107752 114268 134690 142835 148159 163240 188566 207760 215504 228536 269380 285670 296318 326480 377132 457072 471415 538760 571340 592636 659981 713857 740795 754264 942830 1037113 1077520 1142680 1185272 1319962 1427714 1481590 1508528 1885660 2074226 2285360 2370544 2639924 2855428 2963180 3299905 3569285 3771320 4148452 4996999 5185565 5279848 5710856 5926360 6599810 7138570 7259791 7542640 7852427 8296904 9993998 10371130 10559696 11421712 11852720 13199620 14277140 14519582 15704854 16593808 19987996 20742260 24984995 26399240 28554280 29039164 31409708 34978993 36298955 39262135 39975992 41484520 49969990 52798480 54966989 57108560 58078328 62819416 69957986 72597910 78524270 79951984 82969040 99939980 109933978 116156656 125638832 139915972 145195820 157048540 174894965 199879960 219867956 274834945 279831944 290391640 314097080 349789930 384768923 399759920 439735912 549669890 559663888 580783280 628194160 699579860 769537846 879471824 1099339780 1399159720 1539075692 1923844615 2198679560 2798319440 3078151384 3847689230 4397359120 6156302768 7695378460 15390756920 30781513840
• Sum of all divisors σ(n): 92540193120
• Sum of proper divisors (its aliquot sum) s(n): 61758679280
• 30781513840 is an abundant number, because the sum of its proper divisors (61758679280) is greater than itself. Its abundance is 30977165440

Bases of 30781513840

• Binary: 11100101010101110001010000001110000₂
• Hexadecimal: 0x72AB8A070
• Base-36: E52IO34

Squares and roots of 30781513840

• 30781513840 squared (30781513840²) is 947501594282111545600
• 30781513840 cubed (30781513840³) is 29165533437816881405310191104000
• The square root of 30781513840 is 175446.6125064831
• The cube root of 30781513840 is 3133.9831579147

Scales and comparisons

• 30,781,513,840 seconds is equal to 978 years, 39 weeks, 2 days, 12 hours, 30 minutes, 40 seconds.
• To count from 1 to 30,781,513,840 would take you about one thousand, nine hundred fifty-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 30781513840 cubic inches would be around 261.2 feet tall.

Recreational maths with 30781513840

• 30781513840 backwards is 04831518703
• 30781513840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 30781513840's digits is 40
• More coming soon!