81364770

Names of 81364770

• Cardinal: 81364770 can be written as Eighty-one million, three hundred sixty-four thousand, seven hundred seventy.

Scientific notation

• Scientific notation: 8.136477 × 10⁷

Factors of 81364770

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 9762

Divisors of 81364770

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 27 30 31 45 54 62 90 93 135 155 186 270 279 310 465 558 837 930 1395 1674 2790 4185 8370 9721 19442 29163 48605 58326 87489 97210 145815 174978 262467 291630 301351 437445 524934 602702 874890 904053 1312335 1506755 1808106 2624670 2712159 3013510 4520265 5424318 8136477 9040530 13560795 16272954 27121590 40682385 81364770
• Sum of all divisors σ(n): 223994880
• Sum of proper divisors (its aliquot sum) s(n): 142630110
• 81364770 is an abundant number, because the sum of its proper divisors (142630110) is greater than itself. Its abundance is 61265340

Bases of 81364770

• Binary: 100110110011000011100100010₂
• Hexadecimal: 0x4D98722
• Base-36: 1CFXGI

Squares and roots of 81364770

• 81364770 squared (81364770²) is 6620225797152900
• 81364770 cubed (81364770³) is 538653149333412363333000
• The square root of 81364770 is 9020.2422362151
• The cube root of 81364770 is 433.3233916193

Scales and comparisons

• 81,364,770 seconds is equal to 2 years, 30 weeks, 3 days, 17 hours, 19 minutes, 30 seconds.
• To count from 1 to 81,364,770 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 81364770 cubic inches would be around 36.1 feet tall.

Recreational maths with 81364770

• 81364770 backwards is 07746318
• The number of decimal digits it has is: 8
• The sum of 81364770's digits is 36
• More coming soon!