21447040

Names of 21447040

• Cardinal: 21447040 can be written as Twenty-one million, four hundred forty-seven thousand and forty.

Scientific notation

• Scientific notation: 2.144704 × 10⁷

Factors of 21447040

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 108

Divisors of 21447040

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 8 10 16 20 23 31 32 40 46 47 62 64 80 92 94 115 124 128 155 160 184 188 230 235 248 310 320 368 376 460 470 496 620 640 713 736 752 920 940 992 1081 1240 1426 1457 1472 1504 1840 1880 1984 2162 2480 2852 2914 2944 3008 3565 3680 3760 3968 4324 4960 5405 5704 5828 6016 7130 7285 7360 7520 8648 9920 10810 11408 11656 14260 14570 14720 15040 17296 19840 21620 22816 23312 28520 29140 30080 33511 34592 43240 45632 46624 57040 58280 67022 69184 86480 91264 93248 114080 116560 134044 138368 167555 172960 186496 228160 233120 268088 335110 345920 456320 466240 536176 670220 691840 932480 1072352 1340440 2144704 2680880 4289408 5361760 10723520 21447040
• Sum of all divisors σ(n): 56401920
• Sum of proper divisors (its aliquot sum) s(n): 34954880
• 21447040 is an abundant number, because the sum of its proper divisors (34954880) is greater than itself. Its abundance is 13507840

Bases of 21447040

• Binary: 1010001110100000110000000₂
• Hexadecimal: 0x1474180
• Base-36: CRON4

Squares and roots of 21447040

• 21447040 squared (21447040²) is 459975524761600
• 21447040 cubed (21447040³) is 9865113478583025664000
• The square root of 21447040 is 4631.0949029361
• The cube root of 21447040 is 277.8363856187

Scales and comparisons

• 21,447,040 seconds is equal to 35 weeks, 3 days, 5 hours, 30 minutes, 40 seconds.
• To count from 1 to 21,447,040 would take you about eight 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 21447040 cubic inches would be around 23.2 feet tall.

Recreational maths with 21447040

• 21447040 backwards is 04074412
• The number of decimal digits it has is: 8
• The sum of 21447040's digits is 22
• More coming soon!