1388805661

Names of 1388805661

• Cardinal: 1388805661 can be written as One billion, three hundred eighty-eight million, eight hundred five thousand, six hundred sixty-one.

Scientific notation

• Scientific notation: 1.388805661 × 10⁹

Factors of 1388805661

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 23539138

Divisors of 1388805661

• Number of divisors d(n): 4
• Complete list of divisors:
  1 59 23539079 1388805661
• Sum of all divisors σ(n): 1412344800
• Sum of proper divisors (its aliquot sum) s(n): 23539139
• 1388805661 is a deficient number, because the sum of its proper divisors (23539139) is less than itself. Its deficiency is 1365266522

Bases of 1388805661

• Binary: 1010010110001110111111000011101₂
• Hexadecimal: 0x52C77E1D
• Base-36: MYUXB1

Squares and roots of 1388805661

• 1388805661 squared (1388805661²) is 1928781164025646921
• 1388805661 cubed (1388805661³) is 2678702199428987993072019781
• The square root of 1388805661 is 37266.6829889649
• The cube root of 1388805661 is 1115.6992968287

Scales and comparisons

• 1,388,805,661 seconds is equal to 44 years, 8 weeks, 2 days, 3 hours, 21 minutes, 1 second.
• To count from 1 to 1,388,805,661 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 1388805661 cubic inches would be around 93 feet tall.

Recreational maths with 1388805661

• 1388805661 backwards is 1665088831
• The number of decimal digits it has is: 10
• The sum of 1388805661's digits is 46
• More coming soon!