21428960

Names of 21428960

• Cardinal: 21428960 can be written as Twenty-one million, four hundred twenty-eight thousand, nine hundred sixty.

Scientific notation

• Scientific notation: 2.142896 × 10⁷

Factors of 21428960

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 86

Divisors of 21428960

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 19 20 28 32 35 38 40 53 56 70 76 80 95 106 112 133 140 152 160 190 212 224 265 266 280 304 361 371 380 424 530 532 560 608 665 722 742 760 848 1007 1060 1064 1120 1330 1444 1484 1520 1696 1805 1855 2014 2120 2128 2527 2660 2888 2968 3040 3610 3710 4028 4240 4256 5035 5054 5320 5776 5936 7049 7220 7420 8056 8480 10070 10108 10640 11552 11872 12635 14098 14440 14840 16112 19133 20140 20216 21280 25270 28196 28880 29680 32224 35245 38266 40280 40432 50540 56392 57760 59360 70490 76532 80560 80864 95665 101080 112784 133931 140980 153064 161120 191330 202160 225568 267862 281960 306128 382660 404320 535724 563920 612256 669655 765320 1071448 1127840 1339310 1530640 2142896 2678620 3061280 4285792 5357240 10714480 21428960
• Sum of all divisors σ(n): 62215776
• Sum of proper divisors (its aliquot sum) s(n): 40786816
• 21428960 is an abundant number, because the sum of its proper divisors (40786816) is greater than itself. Its abundance is 19357856

Bases of 21428960

• Binary: 1010001101111101011100000₂
• Hexadecimal: 0x146FAE0
• Base-36: CRAOW

Squares and roots of 21428960

• 21428960 squared (21428960²) is 459200326681600
• 21428960 cubed (21428960³) is 9840185432446939136000
• The square root of 21428960 is 4629.1424691837
• The cube root of 21428960 is 277.7582910181

Scales and comparisons

• 21,428,960 seconds is equal to 35 weeks, 3 days, 29 minutes, 20 seconds.
• To count from 1 to 21,428,960 would take you about forty-four minutes!

  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 21428960 cubic inches would be around 23.1 feet tall.

Recreational maths with 21428960

• 21428960 backwards is 06982412
• 21428960 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21428960's digits is 32
• More coming soon!