3884
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 6804
- Proper Divisor Sum (Aliquot Sum)
- 2920
- 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
- 1940
- Möbius Function
- 0
- Radical
- 1942
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 38
- 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 T1 for Zeolite Code ATS.at n=45A008038
- Coordination sequence T1 for Zeolite Code GME and AFX.at n=47A008110
- Numbers k giving rise to prime quadruples (30k+11, 30k+13, 30k+17, 30k+19).at n=39A014561
- Super-3 Numbers (3n^3 contains substring '333' in its decimal expansion).at n=33A014569
- Phi(n) + 5 | sigma(n + 5).at n=42A015784
- Numbers k such that the continued fraction for sqrt(k) has period 56.at n=9A020395
- First row of spectral array W(e-1).at n=19A022161
- a(n) = position of n^3 + (n+1)^3 + (n+2)^3 in A024975.at n=22A024980
- Number of distinct products i*j*k with 1 <= i < j < k <= n.at n=40A027430
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 28 ones.at n=29A031796
- Numbers n such that 105*2^n-1 is prime.at n=24A050578
- Numbers k such that 267*2^k + 1 is prime.at n=26A053350
- Inverse Moebius transform of A000013 (starting at term 0).at n=17A054168
- Number of primes q such that phiter(q)=n where phiter(n)=A064415(n).at n=13A064674
- a(n) = A000203(n)^2 - A001157(n) = sigma(n)^2 - sigma_2(n).at n=29A066293
- a(n) = 6*binomial(n,4) + 3*binomial(n,3) + 4*binomial(n,2) - n + 2.at n=11A066375
- Upper bound on number of regular triangulations of cyclic polytope C(n, n-4).at n=23A066456
- Even numbers k such that k/2 is nonprime and sigma(k+1) > sigma(k).at n=40A067827
- Main diagonal of the square array A096583, in which the n-th diagonal equals the convolution of the n-th row with the antidiagonal sums (A096584).at n=11A096585
- a(n) = Sum_{i=1..n} A005235(i).at n=33A097589