21230040

Names of 21230040

• Cardinal: 21230040 can be written as Twenty-one million, two hundred thirty thousand and forty.

Scientific notation

• Scientific notation: 2.123004 × 10⁷

Factors of 21230040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 493

Divisors of 21230040

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 13 15 20 24 26 30 31 39 40 52 60 62 65 78 93 104 120 124 130 155 156 186 195 248 260 310 312 372 390 403 439 465 520 620 744 780 806 878 930 1209 1240 1317 1560 1612 1756 1860 2015 2195 2418 2634 3224 3512 3720 4030 4390 4836 5268 5707 6045 6585 8060 8780 9672 10536 11414 12090 13170 13609 16120 17121 17560 22828 24180 26340 27218 28535 34242 40827 45656 48360 52680 54436 57070 68045 68484 81654 85605 108872 114140 136090 136968 163308 171210 176917 204135 228280 272180 326616 342420 353834 408270 530751 544360 684840 707668 816540 884585 1061502 1415336 1633080 1769170 2123004 2653755 3538340 4246008 5307510 7076680 10615020 21230040
• Sum of all divisors σ(n): 70963200
• Sum of proper divisors (its aliquot sum) s(n): 49733160
• 21230040 is an abundant number, because the sum of its proper divisors (49733160) is greater than itself. Its abundance is 28503120

Bases of 21230040

• Binary: 1010000111111000111011000₂
• Hexadecimal: 0x143F1D8
• Base-36: CN17C

Squares and roots of 21230040

• 21230040 squared (21230040²) is 450714598401600
• 21230040 cubed (21230040³) is 9568688952649904064000
• The square root of 21230040 is 4607.6067540537
• The cube root of 21230040 is 276.8961628639

Scales and comparisons

• 21,230,040 seconds is equal to 35 weeks, 17 hours, 14 minutes.
• To count from 1 to 21,230,040 would take you about four 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 21230040 cubic inches would be around 23.1 feet tall.

Recreational maths with 21230040

• 21230040 backwards is 04003212
• 21230040 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21230040's digits is 12
• More coming soon!