4438
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 7632
- Proper Divisor Sum (Aliquot Sum)
- 3194
- 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
- 1896
- Möbius Function
- -1
- Radical
- 4438
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 95
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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 polyhexes with n hexagons, having reflectional symmetry (see Harary and Read for precise definition).at n=14A002215
- Numbers that are the sum of 7 positive 6th powers.at n=40A003363
- Number of Twopins positions.at n=43A005686
- Sum of the first n primes.at n=47A007504
- Coordination sequence T1 for Zeolite Code ANA.at n=43A008031
- a(n) = (n+1)*(n^2 +8*n +6)/6. Number of n-dimensional partitions of 4. Number of terms in 4th derivative of a function composed with itself n times.at n=27A008778
- Coordination sequence T4 for Zeolite Code RTH.at n=46A009896
- Numbers k such that the continued fraction for sqrt(k) has period 46.at n=32A020385
- Sum of first prime(n) primes.at n=14A022094
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, 0, 2, 2.at n=13A025248
- Numbers that are the sum of 4 distinct positive cubes in exactly 3 ways.at n=14A025410
- Numbers that are the sum of 4 distinct positive cubes in 3 or more ways.at n=14A025413
- a(n) = T(2n,n), where T is the array in A026268.at n=6A026292
- a(n) = T(n,[ n/2 ]), where T is the array in A026268.at n=12A026297
- Numbers k such that 19*2^k+1 is prime.at n=7A032359
- Number of 6-ary rooted trees with n nodes and height at most 8.at n=12A036625
- a(n)=(s(n)+3)/9, where s(n)=n-th base 9 palindrome that starts with 6.at n=27A043077
- Catafusenes (see reference for precise definition).at n=14A044044
- Composite numbers arising as sum of first k primes.at n=40A053790
- Numbers n such that 2^n in base 3 has same number of 2's as 2^(n+1) in base 3 and 2^n and 2^(n+1) have the same number of digits in base 3.at n=41A056736