81481400

Names of 81481400

• Cardinal: 81481400 can be written as Eighty-one million, four hundred eighty-one thousand, four hundred.

Scientific notation

• Scientific notation: 8.14814 × 10⁷

Factors of 81481400

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 75

Divisors of 81481400

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 4 5 7 8 10 11 13 14 20 22 25 26 28 35 37 40 44 50 52 55 56 65 70 74 77 88 91 100 104 110 121 130 140 143 148 154 175 182 185 200 220 242 259 260 275 280 286 296 308 325 350 364 370 385 407 440 455 481 484 518 520 550 572 605 616 650 700 715 728 740 770 814 847 910 925 962 968 1001 1036 1100 1144 1210 1295 1300 1400 1430 1480 1540 1573 1628 1694 1820 1850 1924 1925 2002 2035 2072 2200 2275 2405 2420 2590 2600 2849 2860 3025 3080 3146 3256 3367 3388 3575 3640 3700 3848 3850 4004 4070 4235 4477 4550 4810 4840 5005 5180 5291 5698 5720 6050 6292 6475 6734 6776 7150 7400 7700 7865 8008 8140 8470 8954 9100 9620 10010 10175 10360 10582 11011 11396 12025 12100 12584 12950 13468 14245 14300 15400 15730 16280 16835 16940 17908 18200 19240 20020 20350 21164 21175 22022 22385 22792 24050 24200 25025 25900 26455 26936 28490 28600 31339 31460 33670 33880 35816 37037 39325 40040 40700 42328 42350 44044 44770 48100 50050 51800 52910 55055 56980 58201 62678 62920 67340 71225 74074 78650 81400 84175 84700 88088 89540 96200 100100 105820 110110 111925 113960 116402 125356 132275 134680 142450 148148 156695 157300 168350 169400 179080 185185 200200 211640 220220 223850 232804 250712 264550 275275 284900 291005 296296 313390 314600 336700 370370 407407 440440 447700 465608 529100 550550 569800 582010 626780 673400 740740 783475 814814 895400 925925 1058200 1101100 1164020 1253560 1455025 1481480 1566950 1629628 1851850 2037035 2202200 2328040 2910050 3133900 3259256 3703700 4074070 5820100 6267800 7407400 8148140 10185175 11640200 16296280 20370350 40740700 81481400
• Sum of all divisors σ(n): 263212320
• Sum of proper divisors (its aliquot sum) s(n): 181730920
• 81481400 is an abundant number, because the sum of its proper divisors (181730920) is greater than itself. Its abundance is 100249520

Bases of 81481400

• Binary: 100110110110100111010111000₂
• Hexadecimal: 0x4DB4EB8
• Base-36: 1CIFG8

Squares and roots of 81481400

• 81481400 squared (81481400²) is 6639218545960000
• 81481400 cubed (81481400³) is 540972822030785144000000
• The square root of 81481400 is 9026.7048251287
• The cube root of 81481400 is 433.5303377737

Scales and comparisons

• 81,481,400 seconds is equal to 2 years, 30 weeks, 5 days, 1 hour, 43 minutes, 20 seconds.
• To count from 1 to 81,481,400 would take you about three 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 81481400 cubic inches would be around 36.1 feet tall.

Recreational maths with 81481400

• 81481400 backwards is 00418418
• 81481400 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 81481400's digits is 26
• More coming soon!