4636
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
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 8680
- Proper Divisor Sum (Aliquot Sum)
- 4044
- 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
- 2160
- Möbius Function
- 0
- Radical
- 2318
- Omega Function (Ω)
- 4
- 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
- 59
- 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
- Number of twin prime pairs <= product of first n primes.at n=6A000882
- Numbers that are the sum of 10 positive 7th powers.at n=23A003377
- Almost-convex polygons of perimeter 2n on square lattice.at n=3A007220
- Coordination sequence T1 for Zeolite Code EUO.at n=42A008095
- Number of rooted trees on n nodes with forbidden limbs.at n=12A014267
- Numbers k such that phi(k) + 10 | sigma(k).at n=9A015801
- Numbers k such that k | (3^k + 3).at n=13A015888
- Pseudoprimes to base 9.at n=36A020138
- Pseudoprimes to base 25.at n=44A020153
- Pseudoprimes to base 73.at n=45A020201
- Pseudoprimes to base 77.at n=23A020205
- Number of partitions in parts not of the form 11k, 11k+3 or 11k-3. Also number of partitions with at most 2 parts of size 1 and differences between parts at distance 4 are greater than 1.at n=35A035946
- Floor of (n/e)^(n/e).at n=13A037446
- Non-palindromic n and its digit reversal have the same sum of prime factors (with repetition).at n=18A085607
- Even pseudoprimes to base 9.at n=15A090083
- a(n) = sum of the first n primes which are coprime to n.at n=45A125902
- A106486-encodings of combinatorial games equivalent to game {1|1}.at n=42A125998
- Concatenation of first two digits and last two digits of n-th even superperfect number A061652(n).at n=38A138869
- a(n) = 171*n + 19.at n=27A139619
- a(n) = n*(3*n + 8).at n=38A140677