2396
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
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 4200
- Proper Divisor Sum (Aliquot Sum)
- 1804
- 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
- 1196
- Möbius Function
- 0
- Radical
- 1198
- Omega Function (Ω)
- 3
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 120
- 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
- Partitioning integers to avoid arithmetic progressions of length 3.at n=18A006999
- Coordination sequence T1 for Zeolite Code AEI.at n=37A008001
- Coordination sequence T3 for Zeolite Code VNI.at n=30A009909
- Nine iterations of Reverse and Add are needed to reach a palindrome.at n=7A015990
- Numbers k such that the continued fraction for sqrt(k) has period 60.at n=6A020399
- a(n) = n^2 - 5.at n=49A028875
- 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 24.at n=25A031522
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 30 ones.at n=7A031798
- Numbers whose base-7 representation contains exactly three 6's.at n=20A043419
- Numbers k such that the string 5,2 occurs in the base 9 representation of k but not of k-1.at n=32A044298
- Numbers n such that string 9,6 occurs in the base 10 representation of n but not of n-1.at n=25A044428
- Numbers n such that string 5,2 occurs in the base 9 representation of n but not of n+1.at n=32A044679
- Numbers k such that string 9,6 occurs in the base 10 representation of k but not of k+1.at n=25A044809
- Odd-index Fibonacci row-sum array: T(n,k)=U(2n+1,n+1+k), 0<=k<=n, n >= 0, U the array in A054125.at n=49A054126
- T(n,4), array T as in A054126.at n=5A054130
- T(2n+1,n), array T as in A054126.at n=4A054132
- McKay-Thompson series of class 48A for Monster.at n=44A058691
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 100 ).at n=15A063373
- Numbers which need nine 'Reverse and Add' steps to reach a palindrome.at n=7A065214
- Irregular triangle read by rows giving T(n,k) = number of rooted graphs on n + 1 nodes with k edges (n >= 0, 0 <= k <= n(n-1)/2).at n=72A070166