18138330

Names of 18138330

• Cardinal: 18138330 can be written as Eighteen million, one hundred thirty-eight thousand, three hundred thirty.

Scientific notation

• Scientific notation: 1.813833 × 10⁷

Factors of 18138330

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 474

Divisors of 18138330

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 27 30 35 42 45 49 54 63 70 81 90 98 105 126 135 147 162 189 210 245 270 294 315 378 405 441 457 490 567 630 735 810 882 914 945 1134 1323 1371 1470 1890 2205 2285 2646 2742 2835 3199 3969 4113 4410 4570 5670 6398 6615 6855 7938 8226 9597 12339 13230 13710 15995 19194 19845 20565 22393 24678 28791 31990 37017 39690 41130 44786 47985 57582 61695 67179 74034 86373 95970 111965 123390 134358 143955 172746 185085 201537 223930 259119 287910 335895 370170 403074 431865 518238 604611 671790 863730 1007685 1209222 1295595 1813833 2015370 2591190 3023055 3627666 6046110 9069165 18138330
• Sum of all divisors σ(n): 56858868
• Sum of proper divisors (its aliquot sum) s(n): 38720538
• 18138330 is an abundant number, because the sum of its proper divisors (38720538) is greater than itself. Its abundance is 20582208

Bases of 18138330

• Binary: 1000101001100010011011010₂
• Hexadecimal: 0x114C4DA
• Base-36: ASRMI

Squares and roots of 18138330

• 18138330 squared (18138330²) is 328999015188900
• 18138330 cubed (18138330³) is 5967492707171280537000
• The square root of 18138330 is 4258.9118328513
• The cube root of 18138330 is 262.7437735469

Scales and comparisons

• 18,138,330 seconds is equal to 29 weeks, 6 days, 22 hours, 25 minutes, 30 seconds.
• To count from 1 to 18,138,330 would take you about forty-four weeks!

  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 18138330 cubic inches would be around 21.9 feet tall.

Recreational maths with 18138330

• 18138330 backwards is 03383181
• 18138330 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 18138330's digits is 27
• More coming soon!