1388638845

Names of 1388638845

• Cardinal: 1388638845 can be written as One billion, three hundred eighty-eight million, six hundred thirty-eight thousand, eight hundred forty-five.

Scientific notation

• Scientific notation: 1.388638845 × 10⁹

Factors of 1388638845

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 447

Divisors of 1388638845

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 5 9 11 15 19 33 45 55 57 95 99 165 171 209 285 361 409 495 627 855 1045 1083 1227 1805 1881 2045 3135 3249 3681 3971 4499 5415 6135 6859 7771 9405 11913 13497 16245 18405 19855 20577 22495 23313 34295 35739 38855 40491 59565 61731 67485 69939 75449 85481 102885 116565 147649 178695 202455 226347 256443 308655 349695 377245 427405 442947 679041 738245 769329 1131735 1282215 1328841 1624139 2214735 2805331 3395205 3846645 4872417 6644205 8120695 8415993 14026655 14617251 24362085 25247979 30858641 42079965 73086255 92575923 126239895 154293205 277727769 462879615 1388638845
• Sum of all divisors σ(n): 2778422400
• Sum of proper divisors (its aliquot sum) s(n): 1389783555
• 1388638845 is an abundant number, because the sum of its proper divisors (1389783555) is greater than itself. Its abundance is 1144710

Bases of 1388638845

• Binary: 1010010110001001111001001111101₂
• Hexadecimal: 0x52C4F27D
• Base-36: MYRCL9

Squares and roots of 1388638845

• 1388638845 squared (1388638845²) is 1928317841842934025
• 1388638845 cubed (1388638845³) is 2677737060689664575887201125
• The square root of 1388638845 is 37264.4447831979
• The cube root of 1388638845 is 1115.6546244047

Scales and comparisons

• 1,388,638,845 seconds is equal to 44 years, 8 weeks, 5 hours, 45 seconds.
• To count from 1 to 1,388,638,845 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 1388638845 cubic inches would be around 93 feet tall.

Recreational maths with 1388638845

• 1388638845 backwards is 5488368831
• The number of decimal digits it has is: 10
• The sum of 1388638845's digits is 54
• More coming soon!