3442
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5166
- Proper Divisor Sum (Aliquot Sum)
- 1724
- 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
- 1720
- Möbius Function
- 1
- Radical
- 3442
- Omega Function (Ω)
- 2
- 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
- 56
- Smith Number
- yes
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- yes
- Odd
- no
Appears in sequences
- Number of quartic bicolored graphs on n unlabeled nodes admitting an automorphism exchanging the colors.at n=9A000843
- Numbers k such that 4!*(2k-5)!/(k!*(k-1)!) is an integer.at n=28A004784
- 5!(2n-6)!/n!(n-1)! is an integer.at n=33A004785
- Number of 3-dimensional polyominoes with n cells.at n=7A006766
- Every prefix prime in base 9 (written in base 9).at n=33A024769
- a(n) = least m such that if r and s in {1/1, 1/3, 1/5, ..., 1/(2n-1)} satisfy r < s, then r < k/m < (k+4)/m < s for some integer k.at n=19A024847
- 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 58.at n=8A031556
- Concatenation of n and n + 8 or {n,n+8}.at n=33A032613
- Number of partitions of n into parts not of the form 7k, 7k+3 or 7k-3. Also number of partitions such that the differences between parts at distance 2 are greater than 1.at n=42A035939
- Digit sum of 'even' number equals digit sum of 'sum' and 'juxtaposition' of its prime factors (counted with multiplicity).at n=36A036926
- Coordination sequence T3 for Zeolite Code STT.at n=39A038426
- Coordination sequence T8 for Zeolite Code SFF.at n=39A038435
- Numbers having three 4's in base 9.at n=25A043471
- Numbers k such that the string 4,4 occurs in the base 9 representation of k but not of k-1.at n=42A044291
- Numbers n such that string 4,2 occurs in the base 10 representation of n but not of n-1.at n=38A044374
- Numbers n such that string 4,2 occurs in the base 10 representation of n but not of n+1.at n=38A044755
- Triangle T(n,d) = number of distinct d-dimensional polyominoes (or polycubes) with n cells (0 < d < n).at n=23A049429
- Triangle read by rows: T(n,d) is the number of distinct properly d-dimensional polyominoes (or polycubes) with n cells (n >= 1, d >= 0).at n=31A049430
- a(1) = 1; a(n) = sum of terms in the continued fraction for the square of the continued fraction [a(1); a(2), a(3), a(4),..., a(n-1)].at n=40A061143
- Harmonic mean of digits is 3.at n=31A062181