21034728

Names of 21034728

• Cardinal: 21034728 can be written as Twenty-one million, thirty-four thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1034728 × 10⁷

Factors of 21034728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 256

Divisors of 21034728

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 13 18 22 24 26 27 33 36 39 44 52 54 66 72 78 81 88 99 104 108 117 132 143 156 162 198 216 227 234 264 286 297 312 324 351 396 429 454 468 572 594 648 681 702 792 858 891 908 936 1053 1144 1188 1287 1362 1404 1716 1782 1816 2043 2106 2376 2497 2574 2724 2808 2951 3432 3564 3861 4086 4212 4994 5148 5448 5902 6129 7128 7491 7722 8172 8424 8853 9988 10296 11583 11804 12258 14982 15444 16344 17706 18387 19976 22473 23166 23608 24516 26559 29964 30888 32461 35412 36774 44946 46332 49032 53118 59928 64922 67419 70824 73548 79677 89892 92664 97383 106236 129844 134838 147096 159354 179784 194766 202257 212472 239031 259688 269676 292149 318708 389532 404514 478062 539352 584298 637416 779064 809028 876447 956124 1168596 1618056 1752894 1912248 2337192 2629341 3505788 5258682 7011576 10517364 21034728
• Sum of all divisors σ(n): 69521760
• Sum of proper divisors (its aliquot sum) s(n): 48487032
• 21034728 is an abundant number, because the sum of its proper divisors (48487032) is greater than itself. Its abundance is 27452304

Bases of 21034728

• Binary: 1010000001111011011101000₂
• Hexadecimal: 0x140F6E8
• Base-36: CIUI0

Squares and roots of 21034728

• 21034728 squared (21034728²) is 442459782033984
• 21034728 cubed (21034728³) is 9307021166024140196352
• The square root of 21034728 is 4586.3632651591
• The cube root of 21034728 is 276.0444162923

Scales and comparisons

• 21,034,728 seconds is equal to 34 weeks, 5 days, 10 hours, 58 minutes, 48 seconds.
• To count from 1 to 21,034,728 would take you about four 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 21034728 cubic inches would be around 23 feet tall.

Recreational maths with 21034728

• 21034728 backwards is 82743012
• 21034728 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21034728's digits is 27
• More coming soon!