1821999816

Names of 1821999816

• Cardinal: 1821999816 can be written as One billion, eight hundred twenty-one million, nine hundred ninety-nine thousand, eight hundred sixteen.

Scientific notation

• Scientific notation: 1.821999816 × 10⁹

Factors of 1821999816

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 21416

Divisors of 1821999816

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 13 14 18 21 24 26 28 36 39 42 52 56 63 72 78 84 91 104 117 126 156 168 169 182 234 252 273 312 338 364 468 504 507 546 676 728 819 936 1014 1092 1183 1352 1521 1638 2028 2184 2366 3042 3276 3549 4056 4732 6084 6552 7098 9464 10647 12168 14196 21294 21391 28392 42588 42782 64173 85176 85564 128346 149737 171128 192519 256692 278083 299474 385038 449211 513384 556166 598948 770076 834249 898422 1112332 1197896 1347633 1540152 1668498 1796844 1946581 2224664 2502747 2695266 3336996 3593688 3615079 3893162 5005494 5390532 5839743 6673992 7230158 7786324 10010988 10781064 10845237 11679486 14460316 15572648 17519229 20021976 21690474 23358972 25305553 28920632 32535711 35038458 43380948 46717944 50611106 65071422 70076916 75916659 86761896 101222212 130142844 140153832 151833318 202444424 227749977 260285688 303666636 455499954 607333272 910999908 1821999816
• Sum of all divisors σ(n): 6106988160
• Sum of proper divisors (its aliquot sum) s(n): 4284988344
• 1821999816 is an abundant number, because the sum of its proper divisors (4284988344) is greater than itself. Its abundance is 2462988528

Bases of 1821999816

• Binary: 1101100100110011000001011001000₂
• Hexadecimal: 0x6C9982C8
• Base-36: U4RS20

Squares and roots of 1821999816

• 1821999816 squared (1821999816²) is 3319683329504033856
• 1821999816 cubed (1821999816³) is 6048462415534617056889770496
• The square root of 1821999816 is 42684.8897854967
• The cube root of 1821999816 is 1221.3761717075

Scales and comparisons

• 1,821,999,816 seconds is equal to 57 years, 48 weeks, 3 days, 23 hours, 3 minutes, 36 seconds.
• To count from 1 to 1,821,999,816 would take you about one hundred fifteen years!

  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 1821999816 cubic inches would be around 101.8 feet tall.

Recreational maths with 1821999816

• 1821999816 backwards is 6189991281
• The number of decimal digits it has is: 10
• The sum of 1821999816's digits is 54
• More coming soon!