138987198

Names of 138987198

• Cardinal: 138987198 can be written as One hundred thirty-eight million, nine hundred eighty-seven thousand, one hundred ninety-eight.

Scientific notation

• Scientific notation: 1.38987198 × 10⁸

Factors of 138987198

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 481

Divisors of 138987198

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 27 29 31 42 54 58 62 63 87 93 126 174 186 189 203 217 261 279 378 406 409 434 522 558 609 651 783 818 837 899 1218 1227 1302 1566 1674 1798 1827 1953 2454 2697 2863 3654 3681 3906 5394 5481 5726 5859 6293 7362 8091 8589 10962 11043 11718 11861 12586 12679 16182 17178 18879 22086 23722 24273 25358 25767 35583 37758 38037 48546 51534 56637 71166 76074 77301 83027 88753 106749 113274 114111 154602 166054 169911 177506 213498 228222 249081 266259 320247 339822 342333 367691 498162 532518 640494 684666 735382 747243 798777 1103073 1494486 1597554 2206146 2241729 2396331 2573837 3309219 4483458 4792662 5147674 6618438 7721511 9927657 15443022 19855314 23164533 46329066 69493599 138987198
• Sum of all divisors σ(n): 377856000
• Sum of proper divisors (its aliquot sum) s(n): 238868802
• 138987198 is an abundant number, because the sum of its proper divisors (238868802) is greater than itself. Its abundance is 99881604

Bases of 138987198

• Binary: 1000010010001100011010111110₂
• Hexadecimal: 0x848C6BE
• Base-36: 2AQZ7I

Squares and roots of 138987198

• 138987198 squared (138987198²) is 19317441207891204
• 138987198 cubed (138987198³) is 2684877026014533932806392
• The square root of 138987198 is 11789.2831843161
• The cube root of 138987198 is 517.9942432141

Scales and comparisons

• 138,987,198 seconds is equal to 4 years, 21 weeks, 5 days, 15 hours, 33 minutes, 18 seconds.
• To count from 1 to 138,987,198 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 138987198 cubic inches would be around 43.2 feet tall.

Recreational maths with 138987198

• 138987198 backwards is 891789831
• 138987198 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138987198's digits is 54
• More coming soon!