398403642

Names of 398403642

• Cardinal: 398403642 can be written as Three hundred ninety-eight million, four hundred three thousand, six hundred forty-two.

Scientific notation

• Scientific notation: 3.98403642 × 10⁸

Factors of 398403642

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 103

Divisors of 398403642

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 6 7 13 14 21 26 37 39 41 42 74 78 82 91 111 123 169 182 222 246 259 273 287 338 481 507 518 533 546 574 777 861 962 1014 1066 1183 1369 1443 1517 1554 1599 1722 2366 2738 2886 3034 3198 3367 3549 3731 4107 4551 6253 6734 6929 7098 7462 8214 9102 9583 10101 10619 11193 12506 13858 17797 18759 19166 19721 20202 20787 21238 22386 28749 31857 35594 37518 39442 41574 43771 48503 53391 56129 57498 59163 63714 87542 97006 106782 112258 118326 124579 131313 138047 145509 168387 231361 249158 256373 262626 276094 291018 336774 373737 392903 414141 462722 512746 694083 729677 747474 769119 785806 828282 1178709 1388166 1459354 1538238 1619527 1794611 2189031 2357418 3239054 3589222 4378062 4858581 5107739 5383833 9485801 9717162 10215478 10767666 15323217 18971602 28457403 30646434 56914806 66400607 132801214 199201821 398403642
• Sum of all divisors σ(n): 1038163392
• Sum of proper divisors (its aliquot sum) s(n): 639759750
• 398403642 is an abundant number, because the sum of its proper divisors (639759750) is greater than itself. Its abundance is 241356108

Bases of 398403642

• Binary: 10111101111110010100000111010₂
• Hexadecimal: 0x17BF283A
• Base-36: 6L767U

Squares and roots of 398403642

• 398403642 squared (398403642²) is 158725461958864164
• 398403642 cubed (398403642³) is 63236802122543937120885288
• The square root of 398403642 is 19960.0511522389
• The cube root of 398403642 is 735.8248207155

Scales and comparisons

• 398,403,642 seconds is equal to 12 years, 34 weeks, 5 days, 3 hours, 40 minutes, 42 seconds.
• To count from 1 to 398,403,642 would take you about nineteen 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 398403642 cubic inches would be around 61.3 feet tall.

Recreational maths with 398403642

• 398403642 backwards is 246304893
• 398403642 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 398403642's digits is 39
• More coming soon!