20400984

Names of 20400984

• Cardinal: 20400984 can be written as Twenty million, four hundred thousand, nine hundred eighty-four.

Scientific notation

• Scientific notation: 2.0400984 × 10⁷

Factors of 20400984

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1681

Divisors of 20400984

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 6 8 9 12 18 19 24 27 36 38 54 57 72 76 81 108 114 152 162 171 216 228 324 342 456 513 648 684 1026 1368 1539 1657 2052 3078 3314 4104 4971 6156 6628 9942 12312 13256 14913 19884 29826 31483 39768 44739 59652 62966 89478 94449 119304 125932 134217 178956 188898 251864 268434 283347 357912 377796 536868 566694 755592 850041 1073736 1133388 1700082 2266776 2550123 3400164 5100246 6800328 10200492 20400984
• Sum of all divisors σ(n): 60185400
• Sum of proper divisors (its aliquot sum) s(n): 39784416
• 20400984 is an abundant number, because the sum of its proper divisors (39784416) is greater than itself. Its abundance is 19383432

Bases of 20400984

• Binary: 1001101110100101101011000₂
• Hexadecimal: 0x1374B58
• Base-36: C59I0

Squares and roots of 20400984

• 20400984 squared (20400984²) is 416200148168256
• 20400984 cubed (20400984³) is 8490892563578219963904
• The square root of 20400984 is 4516.7448455719
• The cube root of 20400984 is 273.2438348003

Scales and comparisons

• 20,400,984 seconds is equal to 33 weeks, 5 days, 2 hours, 56 minutes, 24 seconds.
• To count from 1 to 20,400,984 would take you about fifty weeks!

  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 20400984 cubic inches would be around 22.8 feet tall.

Recreational maths with 20400984

• 20400984 backwards is 48900402
• 20400984 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20400984's digits is 27
• More coming soon!