21640000

Names of 21640000

• Cardinal: 21640000 can be written as Twenty-one million, six hundred forty thousand.

Scientific notation

• Scientific notation: 2.164 × 10⁷

Factors of 21640000

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 548

Divisors of 21640000

• Number of divisors d(n): 70
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 160 200 250 320 400 500 541 625 800 1000 1082 1250 1600 2000 2164 2500 2705 4000 4328 5000 5410 8000 8656 10000 10820 13525 17312 20000 21640 27050 34624 40000 43280 54100 67625 86560 108200 135250 173120 216400 270500 338125 432800 541000 676250 865600 1082000 1352500 2164000 2705000 4328000 5410000 10820000 21640000
• Sum of all divisors σ(n): 53759354
• Sum of proper divisors (its aliquot sum) s(n): 32119354
• 21640000 is an abundant number, because the sum of its proper divisors (32119354) is greater than itself. Its abundance is 10479354

Bases of 21640000

• Binary: 1010010100011001101000000₂
• Hexadecimal: 0x14A3340
• Base-36: CVTJ4

Squares and roots of 21640000

• 21640000 squared (21640000²) is 468289600000000
• 21640000 cubed (21640000³) is 10133786944000000000000
• The square root of 21640000 is 4651.8813398453
• The cube root of 21640000 is 278.6671347057

Scales and comparisons

• 21,640,000 seconds is equal to 35 weeks, 5 days, 11 hours, 6 minutes, 40 seconds.
• To count from 1 to 21,640,000 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 21640000 cubic inches would be around 23.2 feet tall.

Recreational maths with 21640000

• 21640000 backwards is 00004612
• The number of decimal digits it has is: 8
• The sum of 21640000's digits is 13
• More coming soon!