2896
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 10
- Divisor Sum
- 5642
- Proper Divisor Sum (Aliquot Sum)
- 2746
- 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
- 1440
- Möbius Function
- 0
- Radical
- 362
- Omega Function (Ω)
- 5
- 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
- 22
- 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
- E.g.f. tan(tan(x)), zeros omitted.at n=3A003718
- Coordination sequence T1 for Zeolite Code ABW and ATN.at n=37A008000
- Coordination sequence T1 for Zeolite Code FAU.at n=45A008105
- Coordination sequence T4 for Zeolite Code FER.at n=33A008109
- Coordination sequence T2 for Zeolite Code LOV.at n=36A008135
- Powers of sqrt(2) rounded down.at n=23A017910
- Powers of sqrt(2) rounded to nearest integer.at n=23A017911
- Powers of fourth root of 2 rounded down.at n=46A018048
- Powers of fourth root of 2 rounded to nearest integer.at n=46A018049
- Coordination sequence T4 for Zeolite Code SAO.at n=42A019574
- Numbers k such that the continued fraction for sqrt(k) has period 42.at n=26A020381
- Number of ways to partition n labeled elements into pie slices of different sizes of at least 2, allowing the pie to be turned over.at n=10A032221
- Number of dyslexic rooted compound windmills with n nodes where any 2 submills extending from the same node are different.at n=13A032235
- Number of ways to partition n labeled elements into sets of different sizes of at least 2.at n=10A032311
- Numbers n such that string 9,6 occurs in the base 10 representation of n but not of n-1.at n=30A044428
- Numbers k such that string 9,6 occurs in the base 10 representation of k but not of k+1.at n=30A044809
- Numbers for which in base 2 the least number of digits that can be removed to leave a palindrome (possibly beginning with 0) is 5.at n=42A050424
- a(n) = ((8^n) - (-6)^n)/14.at n=5A053455
- Number of trees with n nodes and 11 leaves.at n=5A055298
- a(n) = A017911(n+1) = round(sqrt(2)^(n+1)).at n=22A057048