13721220

Names of 13721220

• Cardinal: 13721220 can be written as Thirteen million, seven hundred twenty-one thousand, two hundred twenty.

Scientific notation

• Scientific notation: 1.372122 × 10⁷

Factors of 13721220

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2500

Divisors of 13721220

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 30 31 36 45 60 62 90 93 124 155 180 186 279 310 372 465 558 620 930 1116 1395 1860 2459 2790 4918 5580 7377 9836 12295 14754 22131 24590 29508 36885 44262 49180 73770 76229 88524 110655 147540 152458 221310 228687 304916 381145 442620 457374 686061 762290 914748 1143435 1372122 1524580 2286870 2744244 3430305 4573740 6860610 13721220
• Sum of all divisors σ(n): 42981120
• Sum of proper divisors (its aliquot sum) s(n): 29259900
• 13721220 is an abundant number, because the sum of its proper divisors (29259900) is greater than itself. Its abundance is 15538680

Bases of 13721220

• Binary: 110100010101111010000100₂
• Hexadecimal: 0xD15E84
• Base-36: 863D0

Squares and roots of 13721220

• 13721220 squared (13721220²) is 188271878288400
• 13721220 cubed (13721220³) is 2583319861808359848000
• The square root of 13721220 is 3704.2165163499
• The cube root of 13721220 is 239.4037281429

Scales and comparisons

• 13,721,220 seconds is equal to 22 weeks, 4 days, 19 hours, 27 minutes.
• To count from 1 to 13,721,220 would take you about thirty-four 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 13721220 cubic inches would be around 20 feet tall.

Recreational maths with 13721220

• 13721220 backwards is 02212731
• 13721220 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 13721220's digits is 18
• More coming soon!