138395439

Names of 138395439

• Cardinal: 138395439 can be written as One hundred thirty-eight million, three hundred ninety-five thousand, four hundred thirty-nine.

Scientific notation

• Scientific notation: 1.38395439 × 10⁸

Factors of 138395439

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 156

Divisors of 138395439

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 7 9 13 21 23 27 31 39 63 69 79 91 93 117 161 189 207 217 237 273 279 299 351 403 483 553 621 651 711 713 819 837 897 1027 1209 1449 1659 1817 1953 2093 2133 2139 2449 2457 2691 2821 3081 3627 4347 4977 4991 5451 5859 6279 6417 7189 7347 8073 8463 9243 9269 10881 12719 14931 14973 16353 17143 18837 19251 21567 22041 23621 25389 27729 27807 31837 38157 44919 49059 51429 56327 56511 64701 64883 66123 70863 76167 83421 95511 114471 134757 154287 165347 168981 194103 194649 212589 222859 250263 286533 343413 394289 462861 496041 506943 583947 637767 668577 732251 859599 1182867 1488123 1520829 1751841 2005731 2196753 3548601 4464369 5125757 6017193 6590259 10645803 15377271 19770777 46131813 138395439
• Sum of all divisors σ(n): 275251200
• Sum of proper divisors (its aliquot sum) s(n): 136855761
• 138395439 is a deficient number, because the sum of its proper divisors (136855761) is less than itself. Its deficiency is 1539678

Bases of 138395439

• Binary: 1000001111111011111100101111₂
• Hexadecimal: 0x83FBF2F
• Base-36: 2AEALR

Squares and roots of 138395439

• 138395439 squared (138395439²) is 19153297536002721
• 138395439 cubed (138395439³) is 2650729020792714877989519
• The square root of 138395439 is 11764.1590859695
• The cube root of 138395439 is 517.2580511495

Scales and comparisons

• 138,395,439 seconds is equal to 4 years, 20 weeks, 5 days, 19 hours, 10 minutes, 39 seconds.
• To count from 1 to 138,395,439 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 138395439 cubic inches would be around 43.1 feet tall.

Recreational maths with 138395439

• 138395439 backwards is 934593831
• The number of decimal digits it has is: 9
• The sum of 138395439's digits is 45
• More coming soon!