1878
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 24
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 3768
- Proper Divisor Sum (Aliquot Sum)
- 1890
- 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
- 624
- Möbius Function
- -1
- Radical
- 1878
- 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
- 86
- 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 n such that n^32 + 1 is prime.at n=35A006315
- Number of unlabeled trivalent 3-connected bipartite planar graphs with 2n nodes without subgraphs R2 and R4.at n=14A007084
- Coordination sequence T1 for Zeolite Code APC.at n=30A008032
- Coordination sequence T5 for Zeolite Code VET.at n=26A009906
- Number of trees on n nodes with forbidden limbs.at n=14A014265
- Number of trees on n nodes with forbidden limbs.at n=14A014266
- a(n) is least k such that k and 6k are anagrams in base n (written in base 10).at n=4A023098
- Numbers with exactly 3 0's in their base 5 expansion.at n=38A023724
- [ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 odd positive integers}.at n=10A024205
- Numbers whose base-5 representation has 3 more 0's than 4's.at n=29A031473
- 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 42.at n=10A031540
- Number of partitions in parts not of the form 7k, 7k+2 or 7k-2. Also number of partitions with 1 part of size 1 and differences between parts at distance 2 are greater than 1.at n=39A035938
- Base-5 palindromes that start with 3.at n=12A043008
- Numbers having two 8's in base 10.at n=42A043522
- Numbers k such that string 1,0 occurs in the base 6 representation of k but not of k-1.at n=44A044108
- Numbers n such that string 2,2 occurs in the base 7 representation of n but not of n-1.at n=38A044154
- Numbers n such that string 2,6 occurs in the base 8 representation of n but not of n-1.at n=33A044209
- Numbers n such that string 1,6 occurs in the base 9 representation of n but not of n-1.at n=26A044266
- Numbers n such that string 7,8 occurs in the base 10 representation of n but not of n-1.at n=20A044410
- Numbers n such that string 2,2 occurs in the base 7 representation of n but not of n+1.at n=38A044535