1388398861

Names of 1388398861

• Cardinal: 1388398861 can be written as One billion, three hundred eighty-eight million, three hundred ninety-eight thousand, eight hundred sixty-one.

Scientific notation

• Scientific notation: 1.388398861 × 10⁹

Factors of 1388398861

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 1495438

Divisors of 1388398861

• Number of divisors d(n): 4
• Complete list of divisors:
  1 929 1494509 1388398861
• Sum of all divisors σ(n): 1389894300
• Sum of proper divisors (its aliquot sum) s(n): 1495439
• 1388398861 is a deficient number, because the sum of its proper divisors (1495439) is less than itself. Its deficiency is 1386903422

Bases of 1388398861

• Binary: 1010010110000010100100100001101₂
• Hexadecimal: 0x52C1490D
• Base-36: MYM7F1

Squares and roots of 1388398861

• 1388398861 squared (1388398861²) is 1927651397226097321
• 1388398861 cubed (1388398861³) is 2676349004313772079951551381
• The square root of 1388398861 is 37261.2246309753
• The cube root of 1388398861 is 1115.5903517093

Scales and comparisons

• 1,388,398,861 seconds is equal to 44 years, 7 weeks, 4 days, 10 hours, 21 minutes, 1 second.
• To count from 1 to 1,388,398,861 would take you about eighty-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 1388398861 cubic inches would be around 93 feet tall.

Recreational maths with 1388398861

• 1388398861 backwards is 1688938831
• The number of decimal digits it has is: 10
• The sum of 1388398861's digits is 55
• More coming soon!