21968128

Names of 21968128

• Cardinal: 21968128 can be written as Twenty-one million, nine hundred sixty-eight thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1968128 × 10⁷

Factors of 21968128

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 86

Divisors of 21968128

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 7 8 13 14 16 23 26 28 32 41 46 52 56 64 82 91 92 104 112 128 161 164 182 184 208 224 256 287 299 322 328 364 368 416 448 533 574 598 644 656 728 736 832 896 943 1066 1148 1196 1288 1312 1456 1472 1664 1792 1886 2093 2132 2296 2392 2576 2624 2912 2944 3328 3731 3772 4186 4264 4592 4784 5152 5248 5824 5888 6601 7462 7544 8372 8528 9184 9568 10304 10496 11648 12259 13202 14924 15088 16744 17056 18368 19136 20608 23296 24518 26404 29848 30176 33488 34112 36736 38272 41216 49036 52808 59696 60352 66976 68224 73472 76544 85813 98072 105616 119392 120704 133952 136448 171626 196144 211232 238784 241408 267904 343252 392288 422464 477568 535808 686504 784576 844928 955136 1373008 1569152 1689856 2746016 3138304 5492032 10984064 21968128
• Sum of all divisors σ(n): 57689856
• Sum of proper divisors (its aliquot sum) s(n): 35721728
• 21968128 is an abundant number, because the sum of its proper divisors (35721728) is greater than itself. Its abundance is 13753600

Bases of 21968128

• Binary: 1010011110011010100000000₂
• Hexadecimal: 0x14F3500
• Base-36: D2UPS

Squares and roots of 21968128

• 21968128 squared (21968128²) is 482598647824384
• 21968128 cubed (21968128³) is 10601788868032989233152
• The square root of 21968128 is 4687.0169617785
• The cube root of 21968128 is 280.0685546425

Scales and comparisons

• 21,968,128 seconds is equal to 36 weeks, 2 days, 6 hours, 15 minutes, 28 seconds.
• To count from 1 to 21,968,128 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 21968128 cubic inches would be around 23.3 feet tall.

Recreational maths with 21968128

• 21968128 backwards is 82186912
• The number of decimal digits it has is: 8
• The sum of 21968128's digits is 37
• More coming soon!