81994080

Names of 81994080

• Cardinal: 81994080 can be written as Eighty-one million, nine hundred ninety-four thousand and eighty.

Scientific notation

• Scientific notation: 8.199408 × 10⁷

Factors of 81994080

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1101

Divisors of 81994080

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 23 24 28 30 32 35 40 42 46 48 56 60 69 70 80 84 92 96 105 112 115 120 138 140 160 161 168 184 210 224 230 240 276 280 322 336 345 368 420 460 480 483 552 560 644 672 690 736 805 840 920 966 1061 1104 1120 1288 1380 1610 1680 1840 1932 2122 2208 2415 2576 2760 3183 3220 3360 3680 3864 4244 4830 5152 5305 5520 6366 6440 7427 7728 8488 9660 10610 11040 12732 12880 14854 15456 15915 16976 19320 21220 22281 24403 25464 25760 29708 31830 33952 37135 38640 42440 44562 48806 50928 59416 63660 73209 74270 77280 84880 89124 97612 101856 111405 118832 122015 127320 146418 148540 169760 170821 178248 195224 222810 237664 244030 254640 292836 297080 341642 356496 366045 390448 445620 488060 509280 512463 585672 594160 683284 712992 732090 780896 854105 891240 976120 1024926 1171344 1188320 1366568 1464180 1708210 1782480 1952240 2049852 2342688 2562315 2733136 2928360 3416420 3564960 3904480 4099704 5124630 5466272 5856720 6832840 8199408 10249260 11713440 13665680 16398816 20498520 27331360 40997040 81994080
• Sum of all divisors σ(n): 308302848
• Sum of proper divisors (its aliquot sum) s(n): 226308768
• 81994080 is an abundant number, because the sum of its proper divisors (226308768) is greater than itself. Its abundance is 144314688

Bases of 81994080

• Binary: 100111000110010000101100000₂
• Hexadecimal: 0x4E32160
• Base-36: 1CTF1C

Squares and roots of 81994080

• 81994080 squared (81994080²) is 6723029155046400
• 81994080 cubed (81994080³) is 551248590381206925312000
• The square root of 81994080 is 9055.0582549203
• The cube root of 81994080 is 434.4376933131

Scales and comparisons

• 81,994,080 seconds is equal to 2 years, 31 weeks, 4 days, 8 minutes.
• To count from 1 to 81,994,080 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 81994080 cubic inches would be around 36.2 feet tall.

Recreational maths with 81994080

• 81994080 backwards is 08049918
• The number of decimal digits it has is: 8
• The sum of 81994080's digits is 39
• More coming soon!