168132721

Names of 168132721

• Cardinal: 168132721 can be written as One hundred sixty-eight million, one hundred thirty-two thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 1.68132721 × 10⁸

Factors of 168132721

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 168132721

Divisors of 168132721

• Number of divisors d(n): 2
• Complete list of divisors:
  1 168132721
• Sum of all divisors σ(n): 168132722
• Sum of proper divisors (its aliquot sum) s(n): 1
• 168132721 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 168132720

Bases of 168132721

• Binary: 1010000001011000000001110001₂
• Hexadecimal: 0xA058071
• Base-36: 2S3O1D

Squares and roots of 168132721

• 168132721 squared (168132721²) is 28268611870863841
• 168132721 cubed (168132721³) is 4752878632741238207841361
• The square root of 168132721 is 12966.6002097697
• The cube root of 168132721 is 551.9301014639

Scales and comparisons

• 168,132,721 seconds is equal to 5 years, 17 weeks, 6 days, 23 hours, 32 minutes, 1 second.
• To count from 1 to 168,132,721 would take you about eight 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 168132721 cubic inches would be around 46 feet tall.

Recreational maths with 168132721

• 168132721 backwards is 127231861
• The number of decimal digits it has is: 9
• The sum of 168132721's digits is 31
• More coming soon!