2394
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 6240
- Proper Divisor Sum (Aliquot Sum)
- 3846
- 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
- 648
- Möbius Function
- 0
- Radical
- 798
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 120
- 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 partitions of n into prime parts.at n=62A000607
- Coordination sequence T3 for Zeolite Code AEI.at n=37A008003
- Coordination sequence T2 for Zeolite Code MEP.at n=29A008158
- Numbers k such that k divides 2^(k+1) - 2.at n=19A014741
- Numbers k that divide s(k), where s(1)=1, s(j)=18*s(j-1)+j.at n=41A014868
- Positive integers n such that n | (2^n + n/2 - 1).at n=17A015942
- Expansion of 1/(1-x^4-x^5-x^6).at n=42A017828
- a(n) = (d(n)-r(n))/2, where d = A026054 and r is the periodic sequence with fundamental period (1,0,0,0).at n=25A026055
- a(n) = n^2 - 7.at n=46A028881
- Numbers whose set of base-13 digits is {1,2}.at n=17A032933
- Every run of digits of n in base 13 has length 2.at n=13A033011
- Numbers whose base-13 expansion has no run of digits with length < 2.at n=26A033026
- a(n) = (2*n-1)*(3*n-1)*(4*n-1).at n=5A033589
- a(n) = n-th quintic factorial number divided by 4.at n=3A034301
- Numbers whose base-4 and base-5 expansions have no digits in common.at n=46A037352
- Numbers whose base-7 representation contains exactly three 6's.at n=18A043419
- Numbers whose base-2 representation has exactly 10 runs.at n=17A043577
- a(n) = (s(n)-1)/2, where s(n) is the n-th number whose base-2 representation has exactly 11 runs.at n=19A043691
- Numbers n such that number of runs in the base 2 representation of n is congruent to 1 mod 9.at n=28A043755
- Numbers n such that number of runs in the base 2 representation of n is congruent to 0 mod 10.at n=17A043763