2238
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4488
- Proper Divisor Sum (Aliquot Sum)
- 2250
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 744
- Möbius Function
- -1
- Radical
- 2238
- 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
- 89
- 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
- yes
- Odd
- no
Appears in sequences
- Numbers k such that k^64 + 1 is prime.at n=22A006316
- Coordination sequence T3 for Zeolite Code TON.at n=29A008243
- Coordination sequence T2 for Scapolite.at n=30A008263
- If i < n, j < n, p/a(i) < q/a(j), then there exists k with p/a(i) < k/a(n) < q/a(j).at n=8A009589
- Coordination sequence for MgZn2, Position Zn2.at n=12A009938
- Coordination sequence T3 for Zeolite Code SAO.at n=37A019573
- a(n) = n*(31*n + 1)/2.at n=12A022289
- Expansion of 1/((1-2x)(1-3x)(1-4x)(1-9x)).at n=3A025470
- 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 30.at n=25A031528
- Fractional part of square root of a(n) starts with 3: first term of runs.at n=44A034109
- Smallest number that can be made to take n steps to reach 0 under "k -> any product of 2 numbers whose concatenation is k".at n=13A035934
- Number of binary rooted trees with n nodes and height exactly 11.at n=16A036600
- Base-5 palindromes that start with 3.at n=26A043008
- Numbers whose base-13 representation has exactly 4 runs.at n=26A043659
- Numbers k such that string 7,6 occurs in the base 8 representation of k but not of k-1.at n=38A044249
- Numbers k such that the string 5,6 occurs in the base 9 representation of k but not of k-1.at n=30A044302
- Numbers n such that string 3,8 occurs in the base 10 representation of n but not of n-1.at n=24A044370
- Numbers n such that string 7,6 occurs in the base 8 representation of n but not of n+1.at n=38A044630
- Numbers n such that string 5,6 occurs in the base 9 representation of n but not of n+1.at n=30A044683
- Numbers n such that string 3,8 occurs in the base 10 representation of n but not of n+1.at n=24A044751