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140 (number)

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140
  
141 →

Factorization
  
2× 5 × 7

Cardinal
  
one hundred forty

Roman numeral
  
CXL

Ordinal
  
140th (one hundred and fortieth)

Divisors
  
1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140

140 (one hundred [and] forty) is the natural number following 139 and preceding 141.

Contents

In mathematics

140 is an abundant number and a harmonic divisor number. It is the sum of the squares of the first seven integers, which makes it a square pyramidal number, and in base 10 it is divisible by the sum of its digits, which makes it a Harshad number.

140 is an odious number because it has an odd number of ones in its binary number. The sum of Euler's totient function φ(x) over the first twenty-one integers is 140.

140 is a repdigit in bases 13, 19, 27, 34, 69, and 139.

In other fields

140 is also:

  • The number of varieties of ashes from different varieties of pipe, cigar, and cigarette tobacco included in the Sherlock Holmes monograph.
  • The Twitter entry-character limit, a well-known characteristic of the service (based on the text messaging limit)
  • A film, based on the Twitter entry-character limit, created and edited by Frank Kelly of Ireland
  • The age that Job died at (Bible, Job 42:16)
  • The atomic number of Unquadnilium, a temporary chemical element
  • PRO 140 antibody found on T lymphocytes of the human immune system
  • Telephone Directory assistance in Egypt
  • A video game developed by Jeppe Carlsen

    • References

    140 (number) Wikipedia
    (Text) CC BY-SA