4376
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 8220
- Proper Divisor Sum (Aliquot Sum)
- 3844
- 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
- 2184
- Möbius Function
- 0
- Radical
- 1094
- Omega Function (Ω)
- 4
- 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
- 33
- 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
- Numbers that are the sum of 8 positive 6th powers.at n=44A003364
- Numbers that are the sum of 4 positive 7th powers.at n=9A003371
- Numbers that are the sum of at most 4 positive 7th powers.at n=27A004866
- Numbers that are the sum of at most 5 positive 7th powers.at n=38A004867
- a(n) = 6*n^2 + 2 for n > 0, a(0)=1.at n=27A005897
- INVERTi transform of central trinomial coefficients (A002426).at n=12A007971
- Coordination sequence T6 for Zeolite Code EUO.at n=41A008101
- Molien series for A_5.at n=47A008628
- Numbers k such that k^2 and k have same last 3 digits.at n=18A008853
- Numbers that are the sum of 3 positive cubes in more than one way.at n=35A008917
- Coordination sequence for NiAs(1), As position.at n=27A009943
- Pseudoprimes to base 9.at n=35A020138
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (odd natural numbers), t = (primes).at n=19A024603
- Numbers that are the sum of 3 distinct positive cubes in 2 or more ways.at n=23A024974
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (odd natural numbers), t = (primes).at n=18A025117
- Numbers that are the sum of 3 positive cubes in exactly 2 ways.at n=35A025396
- Numbers that are the sum of 3 distinct positive cubes in exactly 2 ways.at n=23A025400
- a(n) = Sum_{k=0..floor(n/2)-2} T(n,k) * T(n,k+3), with T given by A026009.at n=5A027290
- Numbers k such that k^2 is palindromic in base 3.at n=34A029984
- 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 15.at n=33A031513