4402
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6912
- Proper Divisor Sum (Aliquot Sum)
- 2510
- 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
- 2100
- Möbius Function
- -1
- Radical
- 4402
- 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
- 139
- 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
- Coordination sequence T1 for Zeolite Code LIO.at n=46A008129
- Coordination sequence T1 for Zeolite Code MFI.at n=42A008161
- Numbers that are the sum of 3 positive cubes in more than one way.at n=36A008917
- a(0) = 1, a(n) = 11*n^2 + 2 for n>0.at n=20A010003
- Numbers n such that phi(n + 1) | sigma(n) for n congruent to 1 (mod 3).at n=18A015817
- Numbers k such that Fib(k) == -21 (mod k).at n=35A023168
- n written in fractional base 8/4.at n=50A024646
- Numbers that are the sum of 3 positive cubes in exactly 2 ways.at n=36A025396
- a(n) = (d(n)-r(n))/5, where d = A026063 and r is the periodic sequence with fundamental period (1,4,0,0,0).at n=40A026065
- a(n)=(s(n)+3)/9, where s(n)=n-th base 9 palindrome that starts with 6.at n=23A043077
- Numbers whose base-4 representation has exactly 7 runs.at n=19A043598
- Numbers k such that number of runs in the base 4 representation of k is congruent to 1 mod 6.at n=37A043838
- Numbers n such that number of runs in the base 4 representation of n is congruent to 0 mod 7.at n=19A043843
- Numbers n such that number of runs in the base 4 representation of n is congruent to 7 mod 8.at n=19A043857
- Numbers n such that number of runs in the base 4 representation of n is congruent to 7 mod 9.at n=19A043865
- Numbers k such that the number of runs in the base-4 representation of k is congruent to 7 (mod 10).at n=19A043874
- a(n) = Sum_{k=0..n} Stirling1(n,k)^2.at n=5A047796
- Numbers n such that replacing digits d in decimal expansion of n with d^2 yields a square.at n=52A048386
- Write 0, 1, 2, 3, 4, ... in a triangular spiral, then a(n) is the sequence found by reading the terms along the line from 0 in the direction 0, 7, ...at n=31A062725
- Numbers k such that sigma(k) = 2*phi(k+1).at n=12A068423