4418
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 6771
- Proper Divisor Sum (Aliquot Sum)
- 2353
- 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
- 2162
- Möbius Function
- 0
- Radical
- 94
- Omega Function (Ω)
- 3
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 77
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- a(n) = 2*n^2.at n=47A001105
- Numbers that are the sum of 8 positive 6th powers.at n=45A003364
- Coordination sequence T1 for Zeolite Code LTN.at n=46A008140
- Coordination sequence T3 for Zeolite Code TON.at n=41A008243
- Coordination sequence T4 for Zeolite Code VNI.at n=41A009910
- Numbers m such that phi(m) * sigma(m) + k^2 is not a square for any k.at n=22A015713
- a(n) = smallest number k such that sigma(k + n) = sigma(k) + n, or -1 if no such number exists.at n=13A015886
- Coordination sequence T3 for Zeolite Code CGF.at n=46A019453
- 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 66.at n=6A031564
- Trajectory of 1 under map n->41n+1 if n odd, n->n/2 if n even.at n=7A033976
- Coordination sequence for 47-dimensional cubic lattice.at n=2A035742
- Coordination sequence for C_47 lattice.at n=1A035784
- Numbers k such that phi(k) + sigma(k) is a prime.at n=27A038344
- Sum of first n primes of form 4k+1.at n=29A038346
- Number of partitions satisfying cn(2,5) < cn(1,5) + cn(4,5) and cn(3,5) < cn(1,5) + cn(4,5).at n=30A039889
- Numbers k such that k and k+1 both have 6 divisors.at n=44A049103
- Numbers that are not squarefree and whose Euler totient function is squarefree.at n=15A049198
- Numbers n such that n^3 is the sum of two nonzero squares in exactly one way.at n=29A050804
- Number of asymmetric types of (3,n)-hypergraphs without isolated nodes, under action of symmetric group S_3; asymmetric n-covers of an unlabeled 3-set.at n=8A055538
- a(n) = prime(n)^2 - prime(n+1).at n=18A062235