138017990

Names of 138017990

• Cardinal: 138017990 can be written as One hundred thirty-eight million, seventeen thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.3801799 × 10⁸

Factors of 138017990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 453

Divisors of 138017990

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 10 11 22 55 61 67 110 122 134 305 307 335 610 614 670 671 737 1342 1474 1535 3070 3355 3377 3685 4087 6710 6754 7370 8174 16885 18727 20435 20569 33770 37454 40870 41138 44957 89914 93635 102845 187270 205690 205997 224785 226259 411994 449570 452518 1029985 1131295 1254709 2059970 2262590 2509418 6273545 12547090 13801799 27603598 69008995 138017990
• Sum of all divisors σ(n): 280482048
• Sum of proper divisors (its aliquot sum) s(n): 142464058
• 138017990 is an abundant number, because the sum of its proper divisors (142464058) is greater than itself. Its abundance is 4446068

Bases of 138017990

• Binary: 1000001110011111110011000110₂
• Hexadecimal: 0x839FCC6
• Base-36: 2A67D2

Squares and roots of 138017990

• 138017990 squared (138017990²) is 19048965563640100
• 138017990 cubed (138017990³) is 2629099938672823685399000
• The square root of 138017990 is 11748.1058047669
• The cube root of 138017990 is 516.7873798187

Scales and comparisons

• 138,017,990 seconds is equal to 4 years, 20 weeks, 1 day, 10 hours, 19 minutes, 50 seconds.
• To count from 1 to 138,017,990 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 138017990 cubic inches would be around 43.1 feet tall.

Recreational maths with 138017990

• 138017990 backwards is 099710831
• The number of decimal digits it has is: 9
• The sum of 138017990's digits is 38
• More coming soon!