398121984

Names of 398121984

• Cardinal: 398121984 can be written as Three hundred ninety-eight million, one hundred twenty-one thousand, nine hundred eighty-four.

Scientific notation

• Scientific notation: 3.98121984 × 10⁸

Factors of 398121984

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 3341

Divisors of 398121984

• Number of divisors d(n): 132
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 24 26 32 36 39 48 52 64 72 78 96 104 117 128 144 156 192 208 234 256 288 312 384 416 468 512 576 624 768 832 936 1024 1152 1248 1536 1664 1872 2304 2496 3072 3323 3328 3744 4608 4992 6646 6656 7488 9216 9969 9984 13292 13312 14976 19938 19968 26584 29907 29952 39876 39936 43199 53168 59814 59904 79752 86398 106336 119628 119808 129597 159504 172796 212672 239256 259194 319008 345592 388791 425344 478512 518388 638016 691184 777582 850688 957024 1036776 1276032 1382368 1555164 1701376 1914048 2073552 2552064 2764736 3110328 3402752 3828096 4147104 5104128 5529472 6220656 7656192 8294208 10208256 11058944 12441312 15312384 16588416 22117888 24882624 30624768 33176832 44235776 49765248 66353664 99530496 132707328 199060992 398121984
• Sum of all divisors σ(n): 1238369496
• Sum of proper divisors (its aliquot sum) s(n): 840247512
• 398121984 is an abundant number, because the sum of its proper divisors (840247512) is greater than itself. Its abundance is 442125528

Bases of 398121984

• Binary: 10111101110101101110000000000₂
• Hexadecimal: 0x17BADC00
• Base-36: 6L14W0

Squares and roots of 398121984

• 398121984 squared (398121984²) is 158501114144096256
• 398121984 cubed (398121984³) is 63102778029258063325691904
• The square root of 398121984 is 19952.9943617493
• The cube root of 398121984 is 735.6513786879

Scales and comparisons

• 398,121,984 seconds is equal to 12 years, 34 weeks, 1 day, 21 hours, 26 minutes, 24 seconds.
• To count from 1 to 398,121,984 would take you about eighteen 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 398121984 cubic inches would be around 61.3 feet tall.

Recreational maths with 398121984

• 398121984 backwards is 489121893
• The number of decimal digits it has is: 9
• The sum of 398121984's digits is 45
• More coming soon!