4419
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 6396
- Proper Divisor Sum (Aliquot Sum)
- 1977
- 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
- 2940
- Möbius Function
- 0
- Radical
- 1473
- 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
- no
- 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
- no
- Odd
- yes
Appears in sequences
- Coordination sequence T2 for Zeolite Code CGF.at n=46A019452
- Number of T-frame polyominoes with n cells.at n=40A028247
- 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 65.at n=15A031563
- Multiplicity of highest weight (or singular) vectors associated with character chi_77 of Monster module.at n=35A034465
- Denominators of continued fraction convergents to sqrt(943).at n=8A042825
- Row/column pre-periods of Sprague-Grundy values of Wythoff's Game.at n=32A046874
- Numbers k such that k and k-1 both have 6 divisors.at n=44A049104
- Coordination sequence T4 for Zeolite Code SFE.at n=44A057320
- Positive numbers whose product of digits is 8 times their sum.at n=40A062040
- a(n) = ceiling(((1*n^0 + 1*n^1 + 2*n^2 + 4*n^3)/(1*n^0 + 2*n^1 + 1*n^2))^2).at n=17A085505
- Bisection of A088567.at n=45A088575
- Least positive k such that 2^n + k is a Chen prime and 2^n + k + 2 is a brilliant number.at n=28A109364
- {Sum of all k-digit numbers > n }-{sum of all k-digit numbers < n}, n is a 'k'digit number.at n=23A109644
- Number of 2-anisohedral polyhexes of order n.at n=13A120117
- Number of integer-sided pentagons having perimeter n.at n=36A124285
- Number of free generators of degree n of symmetric polynomials in 4 noncommuting variables.at n=8A124292
- Sum of proper divisors of the number of partitions of n.at n=31A139055
- a(n) = RMS( A141391(1) through A141391(n) ).at n=35A141392
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (-1, 1, 1), (0, -1, 0), (1, 0, -1), (1, 0, 0)}.at n=8A148735
- Numbers k such that k$ + 1 is prime. Here '$' denotes the swinging factorial function (A056040).at n=53A163077