28128769920

Names of 28128769920

• Cardinal: 28128769920 can be written as Twenty-eight billion, one hundred twenty-eight million, seven hundred sixty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.812876992 × 10¹⁰

Factors of 28128769920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 390

Divisors of 28128769920

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 40 43 45 48 60 64 72 80 86 90 96 120 128 129 144 160 172 180 192 215 240 258 288 320 337 344 360 384 387 430 480 516 576 640 645 674 688 720 774 860 960 1011 1032 1152 1290 1348 1376 1440 1548 1685 1720 1920 1935 2022 2064 2580 2696 2752 2880 3033 3096 3370 3440 3870 4044 4128 5055 5160 5392 5504 5760 6066 6192 6740 6880 7740 8088 8256 10110 10320 10784 12132 12384 13480 13760 14491 15165 15480 16176 16512 20220 20640 21568 24264 24768 26960 27520 28982 30330 30960 32352 40440 41280 43136 43473 48528 49536 53920 57964 60660 61920 64704 72455 80880 82560 86946 97056 107840 113569 115928 121320 123840 129408 130419 144910 161760 173892 194112 215680 217365 227138 231856 242640 247680 260838 289820 323520 340707 347784 388224 434730 454276 463712 485280 521676 567845 579640 647040 652095 681414 695568 869460 908552 927424 970560 1022121 1043352 1135690 1159280 1304190 1362828 1391136 1703535 1738920 1817104 1854848 1941120 2044242 2086704 2271380 2318560 2608380 2725656 2782272 3407070 3477840 3634208 4088484 4173408 4542760 4637120 4883467 5110605 5216760 5451312 5564544 6814140 6955680 7268416 8176968 8346816 9085520 9274240 9766934 10221210 10433520 10902624 13628280 13911360 14536832 14650401 16353936 16693632 18171040 19533868 20442420 20867040 21805248 24417335 27256560 27822720 29300802 32707872 36342080 39067736 40884840 41734080 43610496 43951203 48834670 54513120 58601604 65415744 72684160 73252005 78135472 81769680 83468160 87902406 97669340 109026240 117203208 130831488 146504010 156270944 163539360 175804812 195338680 218052480 219756015 234406416 293008020 312541888 327078720 351609624 390677360 439512030 468812832 586016040 625083776 654157440 703219248 781354720 879024060 937625664 1172032080 1406438496 1562709440 1758048120 1875251328 2344064160 2812876992 3125418880 3516096240 4688128320 5625753984 7032192480 9376256640 14064384960 28128769920
• Sum of all divisors σ(n): 99686850120
• Sum of proper divisors (its aliquot sum) s(n): 71558080200
• 28128769920 is an abundant number, because the sum of its proper divisors (71558080200) is greater than itself. Its abundance is 43429310280

Bases of 28128769920

• Binary: 11010001100100110101111011110000000₂
• Hexadecimal: 0x68C9AF780
• Base-36: CX755S0

Squares and roots of 28128769920

• 28128769920 squared (28128769920²) is 791227697212296806400
• 28128769920 cubed (28128769920³) is 22256261849216122261976383488000
• The square root of 28128769920 is 167716.3376657149
• The cube root of 28128769920 is 3041.2368697305

Scales and comparisons

• 28,128,769,920 seconds is equal to 894 years, 21 weeks, 1 day, 11 hours, 12 minutes.
• To count from 1 to 28,128,769,920 would take you about one thousand, seven hundred eighty-eight 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 28128769920 cubic inches would be around 253.4 feet tall.

Recreational maths with 28128769920

• 28128769920 backwards is 02996782182
• The number of decimal digits it has is: 11
• The sum of 28128769920's digits is 54
• More coming soon!