21249480

Names of 21249480

• Cardinal: 21249480 can be written as Twenty-one million, two hundred forty-nine thousand, four hundred eighty.

Scientific notation

• Scientific notation: 2.124948 × 10⁷

Factors of 21249480

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 675

Divisors of 21249480

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 28 30 35 40 41 42 56 60 70 82 84 105 120 123 140 164 168 205 210 246 280 287 328 410 420 492 574 615 617 820 840 861 984 1148 1230 1234 1435 1640 1722 1851 2296 2460 2468 2870 3085 3444 3702 4305 4319 4920 4936 5740 6170 6888 7404 8610 8638 9255 11480 12340 12957 14808 17220 17276 18510 21595 24680 25297 25914 34440 34552 37020 43190 50594 51828 64785 74040 75891 86380 101188 103656 126485 129570 151782 172760 177079 202376 252970 259140 303564 354158 379455 505940 518280 531237 607128 708316 758910 885395 1011880 1062474 1416632 1517820 1770790 2124948 2656185 3035640 3541580 4249896 5312370 7083160 10624740 21249480
• Sum of all divisors σ(n): 74753280
• Sum of proper divisors (its aliquot sum) s(n): 53503800
• 21249480 is an abundant number, because the sum of its proper divisors (53503800) is greater than itself. Its abundance is 32254320

Bases of 21249480

• Binary: 1010001000011110111001000₂
• Hexadecimal: 0x1443DC8
• Base-36: CNG7C

Squares and roots of 21249480

• 21249480 squared (21249480²) is 451540400270400
• 21249480 cubed (21249480³) is 9594998704737859392000
• The square root of 21249480 is 4609.7158263823
• The cube root of 21249480 is 276.9806535077

Scales and comparisons

• 21,249,480 seconds is equal to 35 weeks, 22 hours, 38 minutes.
• To count from 1 to 21,249,480 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 21249480 cubic inches would be around 23.1 feet tall.

Recreational maths with 21249480

• 21249480 backwards is 08494212
• 21249480 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21249480's digits is 30
• More coming soon!