18231990

Names of 18231990

• Cardinal: 18231990 can be written as Eighteen million, two hundred thirty-one thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.823199 × 10⁷

Factors of 18231990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 5141

Divisors of 18231990

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 17 21 30 34 35 42 51 70 85 102 105 119 170 210 238 255 357 510 595 714 1190 1785 3570 5107 10214 15321 25535 30642 35749 51070 71498 76605 86819 107247 153210 173638 178745 214494 260457 357490 434095 520914 536235 607733 868190 1072470 1215466 1302285 1823199 2604570 3038665 3646398 6077330 9115995 18231990
• Sum of all divisors σ(n): 52959744
• Sum of proper divisors (its aliquot sum) s(n): 34727754
• 18231990 is an abundant number, because the sum of its proper divisors (34727754) is greater than itself. Its abundance is 16495764

Bases of 18231990

• Binary: 1000101100011001010110110₂
• Hexadecimal: 0x11632B6
• Base-36: AURW6

Squares and roots of 18231990

• 18231990 squared (18231990²) is 332405459360100
• 18231990 cubed (18231990³) is 6060413010998749599000
• The square root of 18231990 is 4269.8934412933
• The cube root of 18231990 is 263.1952363921

Scales and comparisons

• 18,231,990 seconds is equal to 30 weeks, 1 day, 26 minutes, 30 seconds.
• To count from 1 to 18,231,990 would take you about forty-five 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 18231990 cubic inches would be around 21.9 feet tall.

Recreational maths with 18231990

• 18231990 backwards is 09913281
• The number of decimal digits it has is: 8
• The sum of 18231990's digits is 33
• More coming soon!