21398230

Names of 21398230

• Cardinal: 21398230 can be written as Twenty-one million, three hundred ninety-eight thousand, two hundred thirty.

Scientific notation

• Scientific notation: 2.139823 × 10⁷

Factors of 21398230

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 253

Divisors of 21398230

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 7 10 14 29 35 58 70 83 127 145 166 203 254 290 406 415 581 635 830 889 1015 1162 1270 1778 2030 2407 2905 3683 4445 4814 5810 7366 8890 10541 12035 16849 18415 21082 24070 25781 33698 36830 51562 52705 73787 84245 105410 128905 147574 168490 257810 305689 368935 611378 737870 1528445 2139823 3056890 4279646 10699115 21398230
• Sum of all divisors σ(n): 46448640
• Sum of proper divisors (its aliquot sum) s(n): 25050410
• 21398230 is an abundant number, because the sum of its proper divisors (25050410) is greater than itself. Its abundance is 3652180

Bases of 21398230

• Binary: 1010001101000001011010110₂
• Hexadecimal: 0x14682D6
• Base-36: CQMZA

Squares and roots of 21398230

• 21398230 squared (21398230²) is 457884247132900
• 21398230 cubed (21398230³) is 9797912433526634767000
• The square root of 21398230 is 4625.8220890995
• The cube root of 21398230 is 277.6254552727

Scales and comparisons

• 21,398,230 seconds is equal to 35 weeks, 2 days, 15 hours, 57 minutes, 10 seconds.
• To count from 1 to 21,398,230 would take you about eleven hours!

  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 21398230 cubic inches would be around 23.1 feet tall.

Recreational maths with 21398230

• 21398230 backwards is 03289312
• The number of decimal digits it has is: 8
• The sum of 21398230's digits is 28
• More coming soon!