1918400913

Names of 1918400913

• Cardinal: 1918400913 can be written as One billion, nine hundred eighteen million, four hundred thousand, nine hundred thirteen.

Scientific notation

• Scientific notation: 1.918400913 × 10⁹

Factors of 1918400913

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 251

Divisors of 1918400913

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 9 11 13 33 39 97 99 117 121 127 143 291 363 381 429 873 1067 1089 1143 1261 1287 1331 1397 1573 1651 3201 3783 3993 4191 4719 4953 9603 11349 11737 11979 12319 12573 13871 14157 14859 15367 17303 18161 35211 36957 41613 46101 51909 54483 105633 110871 124839 129107 135509 138303 152581 155727 160147 163449 169037 199771 387321 406527 457743 480441 507111 599313 1161963 1219581 1373229 1441323 1490599 1521333 1678391 1761617 1797939 2197481 4471797 5035173 5284851 6592443 13415391 15105519 15854553 16396589 19377787 19777329 49189767 58133361 147569301 174400083 213155657 639466971 1918400913
• Sum of all divisors σ(n): 3342323712
• Sum of proper divisors (its aliquot sum) s(n): 1423922799
• 1918400913 is a deficient number, because the sum of its proper divisors (1423922799) is less than itself. Its deficiency is 494478114

Bases of 1918400913

• Binary: 1110010010110000111100110010001₂
• Hexadecimal: 0x72587991
• Base-36: VQ5ZM9

Squares and roots of 1918400913

• 1918400913 squared (1918400913²) is 3680262062999233569
• 1918400913 cubed (1918400913³) is 7060218101736993197069848497
• The square root of 1918400913 is 43799.5537990971
• The cube root of 1918400913 is 1242.5478554953

Scales and comparisons

• 1,918,400,913 seconds is equal to 60 years, 51 weeks, 6 days, 17 hours, 8 minutes, 33 seconds.
• To count from 1 to 1,918,400,913 would take you about one hundred twenty-one 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 1918400913 cubic inches would be around 103.5 feet tall.

Recreational maths with 1918400913

• 1918400913 backwards is 3190048191
• The number of decimal digits it has is: 10
• The sum of 1918400913's digits is 36
• More coming soon!