5602
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 8406
- Proper Divisor Sum (Aliquot Sum)
- 2804
- 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
- 2800
- Möbius Function
- 1
- Radical
- 5602
- Omega Function (Ω)
- 2
- 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
- 36
- Smith Number
- yes
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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 points on surface of truncated tetrahedron: a(n) = 14*n^2 + 2 for n > 0, a(0)=1.at n=20A005905
- Left diagonal of partition triangle A047812.at n=28A007042
- Numbers k such that the continued fraction for sqrt(k) has period 64.at n=24A020403
- a(n) = position of n^2 + (n+1)^2 + (n+2)^2 in A004432.at n=46A024809
- 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 74.at n=10A031572
- "DGK" (bracelet, element, unlabeled) transform of 2,2,2,2,...at n=16A032231
- Numbers whose set of base-7 digits is {2,3}.at n=30A032807
- Numbers whose concatenation of prime factors (with multiplicity) is a square.at n=19A038693
- Base-7 palindromes that start with 2.at n=32A043016
- Numbers that are repdigits in base 7.at n=26A048332
- a(n) = Sum_{i=0..n} T(i,n-i), array T as in A049687.at n=37A049688
- Least m such that reverse(sigma(m)) = sigma(m+n).at n=0A071813
- Numbers n such that sigma(n+1) = reverse(sigma(n)).at n=0A074242
- Sum[k=1..n, T(k,n-k+1)], where T is array A094718.at n=16A094719
- Numbers whose base-7 representation is 222....2.at n=5A125725
- Quartic product sequence: a(n) = 2^n*Product_{k=1..(n-1)/2} (1 + m*cos(k*Pi/n)^2 + q*cos(k*Pi/n)^4), with m=6, q=4.at n=7A152104
- sigma(2*n^2) - sigma(n^2).at n=48A195585
- Moore lower bound on the order of an (8,g)-cage.at n=7A198308
- Number of (w,x,y,z) with all terms in {1,...,n} and w*x+y*z<n^2.at n=9A212111
- Triangle T(n,k) of orders of degree-n irreducible polynomials over GF(7) listed in ascending order.at n=45A212486