21268790

Names of 21268790

• Cardinal: 21268790 can be written as Twenty-one million, two hundred sixty-eight thousand, seven hundred ninety.

Scientific notation

• Scientific notation: 2.126879 × 10⁷

Factors of 21268790

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 237

Divisors of 21268790

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 10 19 23 31 38 46 62 95 115 155 157 190 230 310 314 437 589 713 785 874 1178 1426 1570 2185 2945 2983 3565 3611 4370 4867 5890 5966 7130 7222 9734 13547 14915 18055 24335 27094 29830 36110 48670 67735 68609 92473 111941 135470 137218 184946 223882 343045 462365 559705 686090 924730 1119410 2126879 4253758 10634395 21268790
• Sum of all divisors σ(n): 43683840
• Sum of proper divisors (its aliquot sum) s(n): 22415050
• 21268790 is an abundant number, because the sum of its proper divisors (22415050) is greater than itself. Its abundance is 1146260

Bases of 21268790

• Binary: 1010001001000100100110110₂
• Hexadecimal: 0x1448936
• Base-36: CNV3Q

Squares and roots of 21268790

• 21268790 squared (21268790²) is 452361428064100
• 21268790 cubed (21268790³) is 9621180217595449439000
• The square root of 21268790 is 4611.8098399653
• The cube root of 21268790 is 277.0645281425

Scales and comparisons

• 21,268,790 seconds is equal to 35 weeks, 1 day, 3 hours, 59 minutes, 50 seconds.
• To count from 1 to 21,268,790 would take you about five 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 21268790 cubic inches would be around 23.1 feet tall.

Recreational maths with 21268790

• 21268790 backwards is 09786212
• The number of decimal digits it has is: 8
• The sum of 21268790's digits is 35
• More coming soon!