20909728

Names of 20909728

• Cardinal: 20909728 can be written as Twenty million, nine hundred nine thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.0909728 × 10⁷

Factors of 20909728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 45

Divisors of 20909728

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 7 8 14 16 17 19 28 32 34 38 56 68 76 112 119 133 136 152 224 238 266 272 289 304 323 476 532 544 578 608 646 952 1064 1156 1292 1904 2023 2128 2261 2312 2584 3808 4046 4256 4522 4624 4913 5168 5491 8092 9044 9248 9826 10336 10982 16184 18088 19652 21964 32368 34391 36176 38437 39304 43928 64736 68782 72352 76874 78608 87856 93347 137564 153748 157216 175712 186694 275128 307496 373388 550256 614992 653429 746776 1100512 1229984 1306858 1493552 2613716 2987104 5227432 10454864 20909728
• Sum of all divisors σ(n): 52617600
• Sum of proper divisors (its aliquot sum) s(n): 31707872
• 20909728 is an abundant number, because the sum of its proper divisors (31707872) is greater than itself. Its abundance is 10798144

Bases of 20909728

• Binary: 1001111110000111010100000₂
• Hexadecimal: 0x13F0EA0
• Base-36: CG61S

Squares and roots of 20909728

• 20909728 squared (20909728²) is 437216725033984
• 20909728 cubed (20909728³) is 9142082797511396196352
• The square root of 20909728 is 4572.7156045397
• The cube root of 20909728 is 275.4965266473

Scales and comparisons

• 20,909,728 seconds is equal to 34 weeks, 4 days, 15 minutes, 28 seconds.
• To count from 1 to 20,909,728 would take you about fifty-one 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 20909728 cubic inches would be around 23 feet tall.

Recreational maths with 20909728

• 20909728 backwards is 82790902
• The number of decimal digits it has is: 8
• The sum of 20909728's digits is 37
• More coming soon!