1815990813

Names of 1815990813

• Cardinal: 1815990813 can be written as One billion, eight hundred fifteen million, nine hundred ninety thousand, eight hundred thirteen.

Scientific notation

• Scientific notation: 1.815990813 × 10⁹

Factors of 1815990813

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 6251

Divisors of 1815990813

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 13 17 21 27 39 49 51 63 91 117 119 147 153 189 221 273 351 357 441 459 637 663 819 833 1071 1323 1547 1911 1989 2457 2499 3213 4641 5733 5967 6211 7497 10829 13923 17199 18633 22491 32487 41769 43477 55899 80743 97461 105587 130431 167697 242229 292383 304339 316761 391293 565201 726687 739109 913017 950283 1173879 1372631 1695603 2180061 2217327 2739051 2850849 3956407 4117893 5086809 5173763 6651981 8217153 9608417 11869221 12353679 15260427 15521289 19955943 28825251 35607663 37061037 46563867 67258919 86475753 106822989 139691601 201776757 259427259 605330271 1815990813
• Sum of all divisors σ(n): 3569166720
• Sum of proper divisors (its aliquot sum) s(n): 1753175907
• 1815990813 is a deficient number, because the sum of its proper divisors (1753175907) is less than itself. Its deficiency is 62814906

Bases of 1815990813

• Binary: 1101100001111011101001000011101₂
• Hexadecimal: 0x6C3DD21D
• Base-36: U16ZH9

Squares and roots of 1815990813

• 1815990813 squared (1815990813²) is 3297822632900400969
• 1815990813 cubed (1815990813³) is 5988815604250599703720297797
• The square root of 1815990813 is 42614.4437133703
• The cube root of 1815990813 is 1220.0319827233

Scales and comparisons

• 1,815,990,813 seconds is equal to 57 years, 38 weeks, 4 days, 9 hours, 53 minutes, 33 seconds.
• To count from 1 to 1,815,990,813 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 1815990813 cubic inches would be around 101.7 feet tall.

Recreational maths with 1815990813

• 1815990813 backwards is 3180995181
• The number of decimal digits it has is: 10
• The sum of 1815990813's digits is 45
• More coming soon!