138081638

Names of 138081638

• Cardinal: 138081638 can be written as One hundred thirty-eight million, eighty-one thousand, six hundred thirty-eight.

Scientific notation

• Scientific notation: 1.38081638 × 10⁸

Factors of 138081638

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 69040821

Divisors of 138081638

• Number of divisors d(n): 4
• Complete list of divisors:
  1 2 69040819 138081638
• Sum of all divisors σ(n): 207122460
• Sum of proper divisors (its aliquot sum) s(n): 69040822
• 138081638 is a deficient number, because the sum of its proper divisors (69040822) is less than itself. Its deficiency is 69040816

Bases of 138081638

• Binary: 1000001110101111010101100110₂
• Hexadecimal: 0x83AF566
• Base-36: 2A7KH2

Squares and roots of 138081638

• 138081638 squared (138081638²) is 19066538752763044
• 138081638 cubed (138081638³) is 2632738901971998141386072
• The square root of 138081638 is 11750.8143547585
• The cube root of 138081638 is 516.8668076967

Scales and comparisons

• 138,081,638 seconds is equal to 4 years, 20 weeks, 2 days, 4 hours, 38 seconds.
• To count from 1 to 138,081,638 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 138081638 cubic inches would be around 43.1 feet tall.

Recreational maths with 138081638

• 138081638 backwards is 836180831
• The number of decimal digits it has is: 9
• The sum of 138081638's digits is 38
• More coming soon!