4428
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
- 24
- Divisor Sum
- 11760
- Proper Divisor Sum (Aliquot Sum)
- 7332
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1440
- Möbius Function
- 0
- Radical
- 246
- Omega Function (Ω)
- 6
- 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
- yes
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 139
- Smith Number
- yes
- 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
- Coordination sequence T1 for Zeolite Code MOR.at n=43A008182
- Coordination sequence for 4-dimensional primitive di-isohexagonal orthogonal lattice.at n=9A008530
- Molien series for alternating group Alt_8 (or A_8).at n=34A008631
- Triangle T(n,k) read by rows, arising in enumeration of catafusenes.at n=41A024462
- Self-convolution of row n of array T given by A026736.at n=7A027215
- Every run of digits of n in base 11 has length 2.at n=35A033009
- Four times second pentagonal numbers: a(n) = 2*n*(3*n+1).at n=27A033580
- Decimal part of n-th root of a(n) starts with digit 3.at n=30A034080
- Number of partitions of n such that cn(0,5) = cn(2,5) <= cn(1,5) < cn(3,5) = cn(4,5).at n=72A036851
- Positive integers having more base-11 runs of even length than odd.at n=38A044837
- a(n) = a(n-1) + a(m) for n >= 3, where m = 2^(p+1) + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1 and a(2) = 2.at n=39A050049
- Number of primitive (period n) step cyclic shifted sequence structures using a maximum of two different symbols.at n=20A056439
- Number of primitive (period n) step cyclic shifted sequence structures using exactly two different symbols.at n=20A056444
- a(n) = least value such that sequence increases and pairwise differences are unique.at n=48A058335
- Geometric mean of the digits = 4. In other words, the product of the digits is = 4^k where k is the number of digits.at n=26A061428
- Multiples of 9 having only even digits.at n=31A061831
- Numbers k such that sigma(k) = 2*usigma(k).at n=12A063880
- Sum of absolute values of terms in n-th row of A065432.at n=15A065441
- Smallest k such that gcd(c(k),k) = gcd(A002808(k),k) = A064814(k) = n.at n=35A073257
- Indices of double-safe primes: p=prime(n) is double-safe: q=(p-1)/2 & r=(q-1)/2 are both prime (and q is safe).at n=41A075133