21112728

Names of 21112728

• Cardinal: 21112728 can be written as Twenty-one million, one hundred twelve thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1112728 × 10⁷

Factors of 21112728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1406

Divisors of 21112728

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 7 8 12 13 14 21 24 26 28 39 42 49 52 56 78 84 91 98 104 147 156 168 182 196 273 294 312 364 392 546 588 637 728 1092 1176 1274 1381 1911 2184 2548 2762 3822 4143 5096 5524 7644 8286 9667 11048 15288 16572 17953 19334 29001 33144 35906 38668 53859 58002 67669 71812 77336 107718 116004 125671 135338 143624 203007 215436 232008 251342 270676 377013 406014 430872 502684 541352 754026 812028 879697 1005368 1508052 1624056 1759394 2639091 3016104 3518788 5278182 7037576 10556364 21112728
• Sum of all divisors σ(n): 66170160
• Sum of proper divisors (its aliquot sum) s(n): 45057432
• 21112728 is an abundant number, because the sum of its proper divisors (45057432) is greater than itself. Its abundance is 23944704

Bases of 21112728

• Binary: 1010000100010011110011000₂
• Hexadecimal: 0x1422798
• Base-36: CKIOO

Squares and roots of 21112728

• 21112728 squared (21112728²) is 445747283601984
• 21112728 cubed (21112728³) is 9410941155427548452352
• The square root of 21112728 is 4594.8588661677
• The cube root of 21112728 is 276.3852004337

Scales and comparisons

• 21,112,728 seconds is equal to 34 weeks, 6 days, 8 hours, 38 minutes, 48 seconds.
• To count from 1 to 21,112,728 would take you about two days!

  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 21112728 cubic inches would be around 23 feet tall.

Recreational maths with 21112728

• 21112728 backwards is 82721112
• 21112728 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21112728's digits is 24
• More coming soon!