1218355138

Names of 1218355138

• Cardinal: 1218355138 can be written as One billion, two hundred eighteen million, three hundred fifty-five thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 1.218355138 × 10⁹

Factors of 1218355138

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 310

Divisors of 1218355138

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 7 11 13 14 22 26 77 91 143 154 169 182 277 286 338 554 1001 1183 1859 1939 2002 2197 2366 3047 3601 3718 3878 4394 6094 7202 13013 15379 21329 24167 25207 26026 28561 30758 39611 42658 46813 48334 50414 57122 79222 93626 169169 199927 277277 314171 327691 338338 399854 514943 554554 608569 628342 655382 1029886 1217138 2199197 3604601 4259983 4398394 6694259 7209202 7911397 8519966 13388518 15822794 46859813 55379779 87025367 93719626 110759558 174050734 609177569 1218355138
• Sum of all divisors σ(n): 2477260224
• Sum of proper divisors (its aliquot sum) s(n): 1258905086
• 1218355138 is an abundant number, because the sum of its proper divisors (1258905086) is greater than itself. Its abundance is 40549948

Bases of 1218355138

• Binary: 1001000100111101001111111000010₂
• Hexadecimal: 0x489E9FC2
• Base-36: K5DKUA

Squares and roots of 1218355138

• 1218355138 squared (1218355138²) is 1484389242290999044
• 1218355138 cubed (1218355138³) is 1808513260137165576410488072
• The square root of 1218355138 is 34904.9443202533
• The cube root of 1218355138 is 1068.0492999777

Scales and comparisons

• 1,218,355,138 seconds is equal to 38 years, 38 weeks, 3 days, 7 hours, 58 minutes, 58 seconds.
• To count from 1 to 1,218,355,138 would take you about seventy-seven 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 1218355138 cubic inches would be around 89 feet tall.

Recreational maths with 1218355138

• 1218355138 backwards is 8315538121
• The number of decimal digits it has is: 10
• The sum of 1218355138's digits is 37
• More coming soon!