21128480

Names of 21128480

• Cardinal: 21128480 can be written as Twenty-one million, one hundred twenty-eight thousand, four hundred eighty.

Scientific notation

• Scientific notation: 2.112848 × 10⁷

Factors of 21128480

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 170

Divisors of 21128480

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 37 40 43 74 80 83 86 148 160 166 172 185 215 296 332 344 370 415 430 592 664 688 740 830 860 1184 1328 1376 1480 1591 1660 1720 2656 2960 3071 3182 3320 3440 3569 5920 6142 6364 6640 6880 7138 7955 12284 12728 13280 14276 15355 15910 17845 24568 25456 28552 30710 31820 35690 49136 50912 57104 61420 63640 71380 98272 114208 122840 127280 132053 142760 245680 254560 264106 285520 491360 528212 571040 660265 1056424 1320530 2112848 2641060 4225696 5282120 10564240 21128480
• Sum of all divisors σ(n): 53089344
• Sum of proper divisors (its aliquot sum) s(n): 31960864
• 21128480 is an abundant number, because the sum of its proper divisors (31960864) is greater than itself. Its abundance is 10832384

Bases of 21128480

• Binary: 1010000100110010100100000₂
• Hexadecimal: 0x1426520
• Base-36: CKUU8

Squares and roots of 21128480

• 21128480 squared (21128480²) is 446412667110400
• 21128480 cubed (21128480³) is 9432021108788744192000
• The square root of 21128480 is 4596.5726362149
• The cube root of 21128480 is 276.4539194453

Scales and comparisons

• 21,128,480 seconds is equal to 34 weeks, 6 days, 13 hours, 1 minute, 20 seconds.
• To count from 1 to 21,128,480 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 21128480 cubic inches would be around 23 feet tall.

Recreational maths with 21128480

• 21128480 backwards is 08482112
• The number of decimal digits it has is: 8
• The sum of 21128480's digits is 26
• More coming soon!