12181920

Names of 12181920

• Cardinal: 12181920 can be written as Twelve million, one hundred eighty-one thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.218192 × 10⁷

Factors of 12181920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 670

Divisors of 12181920

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 41 48 60 80 82 96 120 123 160 164 205 240 246 328 410 480 492 615 619 656 820 984 1230 1238 1312 1640 1857 1968 2460 2476 3095 3280 3714 3936 4920 4952 6190 6560 7428 9285 9840 9904 12380 14856 18570 19680 19808 24760 25379 29712 37140 49520 50758 59424 74280 76137 99040 101516 126895 148560 152274 203032 253790 297120 304548 380685 406064 507580 609096 761370 812128 1015160 1218192 1522740 2030320 2436384 3045480 4060640 6090960 12181920
• Sum of all divisors σ(n): 39372480
• Sum of proper divisors (its aliquot sum) s(n): 27190560
• 12181920 is an abundant number, because the sum of its proper divisors (27190560) is greater than itself. Its abundance is 15008640

Bases of 12181920

• Binary: 101110011110000110100000₂
• Hexadecimal: 0xB9E1A0
• Base-36: 793MO

Squares and roots of 12181920

• 12181920 squared (12181920²) is 148399174886400
• 12181920 cubed (12181920³) is 1807786876532133888000
• The square root of 12181920 is 3490.2607352461
• The cube root of 12181920 is 230.0939754599

Scales and comparisons

• 12,181,920 seconds is equal to 20 weeks, 23 hours, 52 minutes.
• To count from 1 to 12,181,920 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 12181920 cubic inches would be around 19.2 feet tall.

Recreational maths with 12181920

• 12181920 backwards is 02918121
• 12181920 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 12181920's digits is 24
• More coming soon!