20402720

Names of 20402720

• Cardinal: 20402720 can be written as Twenty million, four hundred two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.040272 × 10⁷

Factors of 20402720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 614

Divisors of 20402720

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 8 10 13 16 17 20 26 32 34 40 52 65 68 80 85 104 130 136 160 170 208 221 260 272 340 416 442 520 544 577 680 884 1040 1105 1154 1360 1768 2080 2210 2308 2720 2885 3536 4420 4616 5770 7072 7501 8840 9232 9809 11540 15002 17680 18464 19618 23080 30004 35360 37505 39236 46160 49045 60008 75010 78472 92320 98090 120016 127517 150020 156944 196180 240032 255034 300040 313888 392360 510068 600080 637585 784720 1020136 1200160 1275170 1569440 2040272 2550340 4080544 5100680 10201360 20402720
• Sum of all divisors σ(n): 55057968
• Sum of proper divisors (its aliquot sum) s(n): 34655248
• 20402720 is an abundant number, because the sum of its proper divisors (34655248) is greater than itself. Its abundance is 14252528

Bases of 20402720

• Binary: 1001101110101001000100000₂
• Hexadecimal: 0x1375220
• Base-36: C5AU8

Squares and roots of 20402720

• 20402720 squared (20402720²) is 416270983398400
• 20402720 cubed (20402720³) is 8493060318402203648000
• The square root of 20402720 is 4516.9370152793
• The cube root of 20402720 is 273.2515850449

Scales and comparisons

• 20,402,720 seconds is equal to 33 weeks, 5 days, 3 hours, 25 minutes, 20 seconds.
• To count from 1 to 20,402,720 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 20402720 cubic inches would be around 22.8 feet tall.

Recreational maths with 20402720

• 20402720 backwards is 02720402
• 20402720 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 20402720's digits is 17
• More coming soon!