3178
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5472
- Proper Divisor Sum (Aliquot Sum)
- 2294
- 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
- 1356
- Möbius Function
- -1
- Radical
- 3178
- 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
- 30
- 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
- Number of n-input 3-output switching networks with GL(n,2) acting on the input and S(3) and C(2,3) acting on the output.at n=2A001152
- a(n) = floor(1000*log(n)).at n=23A004240
- a(n) = 1000*log(n) rounded to the nearest integer.at n=23A004241
- Number of solutions to non-attacking reflecting queens problem.at n=14A007631
- Coordination sequence T3 for Zeolite Code AFS and BPH.at n=43A008025
- Coordination sequence T2 for Zeolite Code APC.at n=39A008033
- Coordination sequence T2 for Zeolite Code ATV.at n=36A008044
- Coordination sequence T3 for Zeolite Code MFS.at n=35A008175
- Coordination sequence for Paracelsian.at n=38A008260
- If a, b in sequence, so is ab+6.at n=34A009307
- Coordination sequence T3 for Zeolite Code DFO.at n=43A009877
- Coordination sequence T4 for Zeolite Code RSN.at n=37A009888
- a(n) = floor( n*(n-1)*(n-2)/25 ).at n=44A011907
- a(1) = 1, a(n) = n*9^(n-1) + a(n-1).at n=3A014923
- Number of partitions of n with equal nonzero number of parts congruent to each of 1, 2 and 3 (mod 5).at n=51A035588
- Increasing gaps among twin primes: size.at n=28A036063
- Composite numbers whose prime factors contain no digits other than 2 and 7.at n=40A036312
- Number of partitions of n such that cn(1,5) < cn(0,5) = cn(2,5) <= cn(3,5) = cn(4,5).at n=74A036859
- a(n)=(s(n)+2)/8, where s(n)=n-th base 8 palindrome that starts with 6 (in base 8), written in decimal digits.at n=31A043070
- Numbers n such that string 7,8 occurs in the base 10 representation of n but not of n-1.at n=34A044410