2769
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 24
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4032
- Proper Divisor Sum (Aliquot Sum)
- 1263
- 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
- 1680
- Möbius Function
- -1
- Radical
- 2769
- 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
- 66
- 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
- no
- Odd
- yes
Appears in sequences
- Construct a triangle as in A036262. Sequence is one less than the position of the first number larger than 2 in the n-th row (n-th difference).at n=40A000232
- Number of graphs with n nodes and n edges.at n=10A001434
- Expansion of (1-x+x^2)/((1-x)^2*(1-x^2)*(1-x^4)).at n=48A005232
- a(n+1) = a(n)-th composite number, with a(0) = 1.at n=24A006508
- Oscillates under partition transform.at n=42A007213
- Coordination sequence T2 for Zeolite Code DAC.at n=33A008068
- Coordination sequence T1 for Zeolite Code FAU.at n=44A008105
- Coordination sequence T1 for Coesite.at n=28A008267
- Pseudoprimes to base 70.at n=19A020198
- Numbers k such that the continued fraction for sqrt(k) has period 36.at n=33A020375
- Coordination sequence T3 for Zeolite Code MWW.at n=35A024988
- Sequence satisfies T^2(a)=a, where T is defined below.at n=42A027596
- 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 34.at n=26A031532
- Position of first term > 2 in n-th row of Gilbreath array shown in A036262.at n=42A036277
- Numbers whose base-14 representation has exactly 4 runs.at n=10A043665
- Numbers n such that string 1,6 occurs in the base 9 representation of n but not of n-1.at n=38A044266
- Numbers n such that string 6,9 occurs in the base 10 representation of n but not of n-1.at n=30A044401
- Numbers k such that string 1,6 occurs in the base 9 representation of k but not of k+1.at n=38A044647
- Numbers n such that string 6,9 occurs in the base 10 representation of n but not of n+1.at n=30A044782
- Numbers n such that string 7,6 occurs in the base 10 representation of n but not of n+1.at n=29A044789