12138240

Names of 12138240

• Cardinal: 12138240 can be written as Twelve million, one hundred thirty-eight thousand, two hundred forty.

Scientific notation

• Scientific notation: 1.213824 × 10⁷

Factors of 12138240

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 148

Divisors of 12138240

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 29 30 32 40 48 58 60 64 80 87 96 109 116 120 128 145 160 174 192 218 232 240 256 290 320 327 348 384 435 436 464 480 545 580 640 654 696 768 870 872 928 960 1090 1160 1280 1308 1392 1635 1740 1744 1856 1920 2180 2320 2616 2784 3161 3270 3480 3488 3712 3840 4360 4640 5232 5568 6322 6540 6960 6976 7424 8720 9280 9483 10464 11136 12644 13080 13920 13952 15805 17440 18560 18966 20928 22272 25288 26160 27840 27904 31610 34880 37120 37932 41856 47415 50576 52320 55680 63220 69760 75864 83712 94830 101152 104640 111360 126440 139520 151728 189660 202304 209280 252880 303456 379320 404608 418560 505760 606912 758640 809216 1011520 1213824 1517280 2023040 2427648 3034560 4046080 6069120 12138240
• Sum of all divisors σ(n): 40471200
• Sum of proper divisors (its aliquot sum) s(n): 28332960
• 12138240 is an abundant number, because the sum of its proper divisors (28332960) is greater than itself. Its abundance is 16194720

Bases of 12138240

• Binary: 101110010011011100000000₂
• Hexadecimal: 0xB93700
• Base-36: 785XC

Squares and roots of 12138240

• 12138240 squared (12138240²) is 147336870297600
• 12138240 cubed (12138240³) is 1788410292521140224000
• The square root of 12138240 is 3483.9977037879
• The cube root of 12138240 is 229.8186345903

Scales and comparisons

• 12,138,240 seconds is equal to 20 weeks, 11 hours, 44 minutes.
• To count from 1 to 12,138,240 would take you about thirty 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 12138240 cubic inches would be around 19.2 feet tall.

Recreational maths with 12138240

• 12138240 backwards is 04283121
• The number of decimal digits it has is: 8
• The sum of 12138240's digits is 21
• More coming soon!