21490140

Names of 21490140

• Cardinal: 21490140 can be written as Twenty-one million, four hundred ninety thousand, one hundred forty.

Scientific notation

• Scientific notation: 2.149014 × 10⁷

Factors of 21490140

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2729

Divisors of 21490140

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 7 10 12 14 15 19 20 21 28 30 35 38 42 57 60 70 76 84 95 105 114 133 140 190 210 228 266 285 380 399 420 532 570 665 798 1140 1330 1596 1995 2660 2693 3990 5386 7980 8079 10772 13465 16158 18851 26930 32316 37702 40395 51167 53860 56553 75404 80790 94255 102334 113106 153501 161580 188510 204668 226212 255835 282765 307002 358169 377020 511670 565530 614004 716338 767505 1023340 1074507 1131060 1432676 1535010 1790845 2149014 3070020 3581690 4298028 5372535 7163380 10745070 21490140
• Sum of all divisors σ(n): 72414720
• Sum of proper divisors (its aliquot sum) s(n): 50924580
• 21490140 is an abundant number, because the sum of its proper divisors (50924580) is greater than itself. Its abundance is 29434440

Bases of 21490140

• Binary: 1010001111110100111011100₂
• Hexadecimal: 0x147E9DC
• Base-36: CSLWC

Squares and roots of 21490140

• 21490140 squared (21490140²) is 461826117219600
• 21490140 cubed (21490140³) is 9924707914705614744000
• The square root of 21490140 is 4635.7458946755
• The cube root of 21490140 is 278.0223745425

Scales and comparisons

• 21,490,140 seconds is equal to 35 weeks, 3 days, 17 hours, 29 minutes.
• To count from 1 to 21,490,140 would take you about two 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 21490140 cubic inches would be around 23.2 feet tall.

Recreational maths with 21490140

• 21490140 backwards is 04109412
• 21490140 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21490140's digits is 21
• More coming soon!