7608
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 19080
- Proper Divisor Sum (Aliquot Sum)
- 11472
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 2528
- Möbius Function
- 0
- Radical
- 1902
- Omega Function (Ω)
- 5
- 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
- 31
- 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
- Coordination sequence for CaF2(2), Ca position.at n=39A009926
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite DAC = Dachiardite Na5[Al5Si19O48].12H2O starting with a T4 atom.at n=12A019105
- Fibonacci sequence beginning 4, 10.at n=15A022382
- Denominators of continued fraction convergents to sqrt(991).at n=8A042919
- a(n) = |{m : multiplicative order of 4 mod m=n}|.at n=35A059886
- a(n) = |{m : multiplicative order of 8 mod m = n}|.at n=23A059890
- a(n) = Sum_{i=1..n} Sum_{j=1..i} (prime(i)^2 - prime(j)^2).at n=8A062021
- a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 76.at n=2A093276
- Self-convolution of A093659, which is the first column of triangle A093658.at n=46A093677
- Partial sums of A006567.at n=25A172463
- Sequence whose Hankel transform is the Somos (4) sequence.at n=11A173992
- Sum of the numbers already removed (including the target number) in the first jump of a Sieve of Eratosthenes table.at n=21A179654
- Expansion of -2*x^4 *(3*x^13 +2*x^12 +x^11 -6*x^10 -10*x^9 -6*x^8 +x^7 +7*x^6 +5*x^5 -x^4 -8*x^3 -11*x^2 -8*x -5) / ((x -1)^4 *(x +1)^2 *(x^2 +1)^2 *(x^2 +x +1)^2).at n=45A187397
- Number of n X 4 0..2 arrays with rows unimodal and antidiagonals nondecreasing.at n=2A224370
- T(n,k)=Number of nXk 0..2 arrays with rows unimodal and antidiagonals nondecreasing.at n=17A224374
- Number of 3Xn 0..2 arrays with rows unimodal and antidiagonals nondecreasing.at n=3A224375
- Numbers k such that Bernoulli number B_k has denominator 2730.at n=28A249134
- Number of (n+2)X(1+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=4A253037
- Number of (n+2)X(5+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=0A253041
- T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=10A253044