18971940

Names of 18971940

• Cardinal: 18971940 can be written as Eighteen million, nine hundred seventy-one thousand, nine hundred forty.

Scientific notation

• Scientific notation: 1.897194 × 10⁷

Factors of 18971940

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1894

Divisors of 18971940

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 10 12 13 15 20 26 30 39 52 60 65 78 130 156 169 195 260 338 390 507 676 780 845 1014 1690 1871 2028 2535 3380 3742 5070 5613 7484 9355 10140 11226 18710 22452 24323 28065 37420 48646 56130 72969 97292 112260 121615 145938 243230 291876 316199 364845 486460 632398 729690 948597 1264796 1459380 1580995 1897194 3161990 3794388 4742985 6323980 9485970 18971940
• Sum of all divisors σ(n): 57552768
• Sum of proper divisors (its aliquot sum) s(n): 38580828
• 18971940 is an abundant number, because the sum of its proper divisors (38580828) is greater than itself. Its abundance is 19608888

Bases of 18971940

• Binary: 1001000010111110100100100₂
• Hexadecimal: 0x1217D24
• Base-36: BAMUC

Squares and roots of 18971940

• 18971940 squared (18971940²) is 359934507363600
• 18971940 cubed (18971940³) is 6828655877631777384000
• The square root of 18971940 is 4355.6790515373
• The cube root of 18971940 is 266.7087398893

Scales and comparisons

• 18,971,940 seconds is equal to 31 weeks, 2 days, 13 hours, 59 minutes.
• To count from 1 to 18,971,940 would take you about forty-seven 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 18971940 cubic inches would be around 22.2 feet tall.

Recreational maths with 18971940

• 18971940 backwards is 04917981
• 18971940 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 18971940's digits is 39
• More coming soon!