21998240

Names of 21998240

• Cardinal: 21998240 can be written as Twenty-one million, nine hundred ninety-eight thousand, two hundred forty.

Scientific notation

• Scientific notation: 2.199824 × 10⁷

Factors of 21998240

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 478

Divisors of 21998240

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 29 32 40 44 55 58 80 88 110 116 145 160 176 220 232 290 319 352 431 440 464 580 638 862 880 928 1160 1276 1595 1724 1760 2155 2320 2552 3190 3448 4310 4640 4741 5104 6380 6896 8620 9482 10208 12499 12760 13792 17240 18964 23705 24998 25520 34480 37928 47410 49996 51040 62495 68960 75856 94820 99992 124990 137489 151712 189640 199984 249980 274978 379280 399968 499960 549956 687445 758560 999920 1099912 1374890 1999840 2199824 2749780 4399648 5499560 10999120 21998240
• Sum of all divisors σ(n): 58786560
• Sum of proper divisors (its aliquot sum) s(n): 36788320
• 21998240 is an abundant number, because the sum of its proper divisors (36788320) is greater than itself. Its abundance is 14790080

Bases of 21998240

• Binary: 1010011111010101010100000₂
• Hexadecimal: 0x14FAAA0
• Base-36: D3HY8

Squares and roots of 21998240

• 21998240 squared (21998240²) is 483922563097600
• 21998240 cubed (21998240³) is 10645444684436148224000
• The square root of 21998240 is 4690.2281394405
• The cube root of 21998240 is 280.1964607615

Scales and comparisons

• 21,998,240 seconds is equal to 36 weeks, 2 days, 14 hours, 37 minutes, 20 seconds.
• To count from 1 to 21,998,240 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 21998240 cubic inches would be around 23.3 feet tall.

Recreational maths with 21998240

• 21998240 backwards is 04289912
• The number of decimal digits it has is: 8
• The sum of 21998240's digits is 35
• More coming soon!