138788821409

Names of 138788821409

• Cardinal: 138788821409 can be written as One hundred thirty-eight billion, seven hundred eighty-eight million, eight hundred twenty-one thousand, four hundred nine.

Scientific notation

• Scientific notation: 1.38788821409 × 10¹¹

Factors of 138788821409

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 96

Divisors of 138788821409

• Number of divisors d(n): 72
• Complete list of divisors:
  1 7 19 23 47 133 161 329 361 437 529 893 1081 2209 2527 3059 3703 6251 7567 8303 10051 15463 16967 20539 24863 41971 50807 58121 70357 103823 118769 143773 174041 190969 293797 355649 390241 472397 726761 797449 965333 1168561 1336783 1972637 2387929 2731687 3306779 5582143 6757331 8179927 8975543 13808459 16715503 18341327 22202659 37480103 45370651 54922367 62828801 128389289 155418613 262360721 317594557 384456569 421850521 862042369 1043524973 2952953647 6034296583 7304674811 19826974487 138788821409
• Sum of all divisors σ(n): 178802507520
• Sum of proper divisors (its aliquot sum) s(n): 40013686111
• 138788821409 is a deficient number, because the sum of its proper divisors (40013686111) is less than itself. Its deficiency is 98775135298

Bases of 138788821409

• Binary: 10000001010000011101010101100110100001₂
• Hexadecimal: 0x20507559A1
• Base-36: 1RRBA3Z5

Squares and roots of 138788821409

• 138788821409 squared (138788821409²) is 19262336948099296745281
• 138788821409 cubed (138788821409³) is 2673397042609735397979299672520929
• The square root of 138788821409 is 372543.7174466911
• The cube root of 138788821409 is 5177.4768127345

Scales and comparisons

• 138,788,821,409 seconds is equal to 4,413 years, 2 weeks, 6 days, 2 hours, 23 minutes, 29 seconds.
• To count from 1 to 138,788,821,409 would take you about eight thousand, eight hundred twenty-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 138788821409 cubic inches would be around 431.5 feet tall.

Recreational maths with 138788821409

• 138788821409 backwards is 904128887831
• The number of decimal digits it has is: 12
• The sum of 138788821409's digits is 59
• More coming soon!