21983920

Names of 21983920

• Cardinal: 21983920 can be written as Twenty-one million, nine hundred eighty-three thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.198392 × 10⁷

Factors of 21983920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1112

Divisors of 21983920

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 35 37 40 56 70 74 80 112 140 148 185 259 280 296 370 518 560 592 740 1036 1061 1295 1480 2072 2122 2590 2960 4144 4244 5180 5305 7427 8488 10360 10610 14854 16976 20720 21220 29708 37135 39257 42440 59416 74270 78514 84880 118832 148540 157028 196285 274799 297080 314056 392570 549598 594160 628112 785140 1099196 1373995 1570280 2198392 2747990 3140560 4396784 5495980 10991960 21983920
• Sum of all divisors σ(n): 60049728
• Sum of proper divisors (its aliquot sum) s(n): 38065808
• 21983920 is an abundant number, because the sum of its proper divisors (38065808) is greater than itself. Its abundance is 16081888

Bases of 21983920

• Binary: 1010011110111001010110000₂
• Hexadecimal: 0x14F72B0
• Base-36: D36WG

Squares and roots of 21983920

• 21983920 squared (21983920²) is 483292738566400
• 21983920 cubed (21983920³) is 10624668901224652288000
• The square root of 21983920 is 4688.7013127305
• The cube root of 21983920 is 280.1356485589

Scales and comparisons

• 21,983,920 seconds is equal to 36 weeks, 2 days, 10 hours, 38 minutes, 40 seconds.
• To count from 1 to 21,983,920 would take you about two 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 21983920 cubic inches would be around 23.3 feet tall.

Recreational maths with 21983920

• 21983920 backwards is 02938912
• The number of decimal digits it has is: 8
• The sum of 21983920's digits is 34
• More coming soon!