2018
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3030
- Proper Divisor Sum (Aliquot Sum)
- 1012
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1008
- Möbius Function
- 1
- Radical
- 2018
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 112
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Number of partitions of n into prime parts.at n=60A000607
- Number of points on surface of truncated tetrahedron: a(n) = 14*n^2 + 2 for n > 0, a(0)=1.at n=12A005905
- Expansion of (1+x^5)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=50A008766
- Numbers whose least quadratic nonresidue (A020649) is 11.at n=11A025024
- Partial sums of A028357.at n=39A028358
- a(n) = n^2 - 7.at n=42A028881
- a(n+1) = Sum_{k=0..floor(n/3)} a(k) * a(n-k).at n=15A030032
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 44.at n=6A031542
- a(n) = 2*n^2 + 3*n + 3.at n=31A033816
- Number of partitions of n into parts 4k+2 and 4k+3 with at least one part of each type.at n=52A035626
- Denominators of continued fraction convergents to sqrt(179).at n=7A041331
- Numbers k such that 1 and 8 occur juxtaposed in the base-10 representation of k but not of k-1.at n=39A043231
- Numbers k such that 1 and 8 occur juxtaposed in the base-10 representation of k but not of k+1.at n=39A044011
- Numbers n such that string 4,2 occurs in the base 8 representation of n but not of n-1.at n=35A044221
- Numbers k such that the string 8,2 occurs in the base 9 representation of k but not of k-1.at n=26A044325
- Numbers n such that string 1,8 occurs in the base 10 representation of n but not of n-1.at n=22A044350
- Numbers n such that string 4,2 occurs in the base 8 representation of n but not of n+1.at n=35A044602
- Numbers n such that string 8,2 occurs in the base 9 representation of n but not of n+1.at n=26A044706
- Numbers n such that string 1,8 occurs in the base 10 representation of n but not of n+1.at n=22A044731
- Numbers whose base-3 representation contains exactly two 0's and no 1's.at n=27A044975