1978730728

Names of 1978730728

• Cardinal: 1978730728 can be written as One billion, nine hundred seventy-eight million, seven hundred thirty thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.978730728 × 10⁹

Factors of 1978730728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1021

Divisors of 1978730728

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 4 8 13 26 52 104 149 298 596 857 1192 1714 1937 3428 3874 6856 7748 11141 15496 22201 22282 44402 44564 88804 89128 127693 177608 255386 288613 510772 577226 1021544 1154452 1660009 2308904 3320018 6640036 13280072 19026257 38052514 76105028 152210056 247341341 494682682 989365364 1978730728
• Sum of all divisors σ(n): 4027203180
• Sum of proper divisors (its aliquot sum) s(n): 2048472452
• 1978730728 is an abundant number, because the sum of its proper divisors (2048472452) is greater than itself. Its abundance is 69741724

Bases of 1978730728

• Binary: 1110101111100010000100011101000₂
• Hexadecimal: 0x75F108E8
• Base-36: WQ32EG

Squares and roots of 1978730728

• 1978730728 squared (1978730728²) is 3915375293931409984
• 1978730728 cubed (1978730728³) is 7747473405754112859706788352
• The square root of 1978730728 is 44482.9262526647
• The cube root of 1978730728 is 1255.4388560599

Scales and comparisons

• 1,978,730,728 seconds is equal to 62 years, 47 weeks, 4 days, 23 hours, 25 minutes, 28 seconds.
• To count from 1 to 1,978,730,728 would take you about one hundred twenty-five 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 1978730728 cubic inches would be around 104.6 feet tall.

Recreational maths with 1978730728

• 1978730728 backwards is 8270378791
• 1978730728 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 1978730728's digits is 52
• More coming soon!