9440
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 22680
- Proper Divisor Sum (Aliquot Sum)
- 13240
- 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
- 3712
- Möbius Function
- 0
- Radical
- 590
- Omega Function (Ω)
- 7
- 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
- 60
- 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
- Number of trees by stability index.at n=18A003428
- Genocchi medians (or Genocchi numbers of second kind).at n=6A005439
- Seidel's triangle, read by rows.at n=36A014781
- Seidel's triangle, read by rows.at n=42A014781
- Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 25 (most significant digit on right).at n=19A029518
- 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 47.at n=32A031545
- Number of partitions of n into parts not of the form 17k, 17k+8 or 17k-8. Also number of partitions with at most 7 parts of size 1 and differences between parts at distance 7 are greater than 1.at n=35A035969
- Numbers whose base-5 representation contains exactly three 0's and two 3's.at n=33A045201
- Smallest number starting a longest interval of consecutive integers, each of which is divisible by at least one of the first n primes.at n=5A049300
- Numbers n such that 8*9^n +1 is prime.at n=12A056799
- Triangle of coefficients of Gandhi polynomials.at n=21A058942
- Numbers k such that k-1, k-3, k-7 and k-9 are all prime.at n=11A064974
- Numbers k for which 10*2^k + 3 is a prime (giving terms of A068712).at n=46A068713
- Maximum value taken on by f(P) = Sum_{i=1..n} p(i)*p(n+1-i) as {p(1),p(2),...,p(n)} ranges over all permutations P of {1,2,3,...,n}.at n=30A087035
- Number of n X n matrices with entries {-1,1} that are diagonalizable over the real numbers.at n=3A091503
- Triangle of coefficients of a certain sequence of polynomials f_n(x) arising in connection with deformations of coordinate rings of type D Kleinian singularities.at n=26A097418
- Triangle of coefficients of a certain sequence of polynomials f_n(x) arising in connection with deformations of coordinate rings of type D Kleinian singularities.at n=25A097418
- Triangle of Salie numbers T(n,k) for negative n,k, n < k.at n=21A098435
- Number of partitions of Fibonacci(n) into odd Fibonacci numbers.at n=12A098642
- Triangle read by rows: Each row is constructed by forming the partial sums of the previous row, reading from the right and at every other row repeating the final term.at n=41A099959