138949830

Names of 138949830

• Cardinal: 138949830 can be written as One hundred thirty-eight million, nine hundred forty-nine thousand, eight hundred thirty.

Scientific notation

• Scientific notation: 1.3894983 × 10⁸

Factors of 138949830

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 492

Divisors of 138949830

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 27 30 45 54 81 90 135 162 211 243 270 271 405 422 486 542 633 810 813 1055 1215 1266 1355 1626 1899 2110 2430 2439 2710 3165 3798 4065 4878 5697 6330 7317 8130 9495 11394 12195 14634 17091 18990 21951 24390 28485 34182 36585 43902 51273 56970 57181 65853 73170 85455 102546 109755 114362 131706 170910 171543 219510 256365 285905 329265 343086 512730 514629 571810 658530 857715 1029258 1543887 1715430 2573145 3087774 4631661 5146290 7719435 9263322 13894983 15438870 23158305 27789966 46316610 69474915 138949830
• Sum of all divisors σ(n): 377814528
• Sum of proper divisors (its aliquot sum) s(n): 238864698
• 138949830 is an abundant number, because the sum of its proper divisors (238864698) is greater than itself. Its abundance is 99914868

Bases of 138949830

• Binary: 1000010010000011010011000110₂
• Hexadecimal: 0x84834C6
• Base-36: 2AQ6DI

Squares and roots of 138949830

• 138949830 squared (138949830²) is 19307055257028900
• 138949830 cubed (138949830³) is 2682712045764771960087000
• The square root of 138949830 is 11787.6982485979
• The cube root of 138949830 is 517.9478165309

Scales and comparisons

• 138,949,830 seconds is equal to 4 years, 21 weeks, 5 days, 5 hours, 10 minutes, 30 seconds.
• To count from 1 to 138,949,830 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 138949830 cubic inches would be around 43.2 feet tall.

Recreational maths with 138949830

• 138949830 backwards is 038949831
• 138949830 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138949830's digits is 45
• More coming soon!