138237421

Names of 138237421

• Cardinal: 138237421 can be written as One hundred thirty-eight million, two hundred thirty-seven thousand, four hundred twenty-one.

Scientific notation

• Scientific notation: 1.38237421 × 10⁸

Factors of 138237421

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1161683

Divisors of 138237421

• Number of divisors d(n): 8
• Complete list of divisors:
  1 7 17 119 1161659 8131613 19748203 138237421
• Sum of all divisors σ(n): 167279040
• Sum of proper divisors (its aliquot sum) s(n): 29041619
• 138237421 is a deficient number, because the sum of its proper divisors (29041619) is less than itself. Its deficiency is 109195802

Bases of 138237421

• Binary: 1000001111010101010111101101₂
• Hexadecimal: 0x83D55ED
• Base-36: 2AAWOD

Squares and roots of 138237421

• 138237421 squared (138237421²) is 19109584564731241
• 138237421 cubed (138237421³) is 2641659686609854313969461
• The square root of 138237421 is 11757.4410906455
• The cube root of 138237421 is 517.0611101437

Scales and comparisons

• 138,237,421 seconds is equal to 4 years, 20 weeks, 3 days, 23 hours, 17 minutes, 1 second.
• To count from 1 to 138,237,421 would take you about six 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 138237421 cubic inches would be around 43.1 feet tall.

Recreational maths with 138237421

• 138237421 backwards is 124732831
• The number of decimal digits it has is: 9
• The sum of 138237421's digits is 31
• More coming soon!