2078
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3120
- Proper Divisor Sum (Aliquot Sum)
- 1042
- 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
- 1038
- Möbius Function
- 1
- Radical
- 2078
- 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
- 63
- Smith Number
- no
- 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
- Conjecturally largest even integer which is an unordered sum of two primes in exactly n ways.at n=27A000954
- Numbers k such that (k^2 + k + 1)/19 is prime.at n=46A002643
- Expansion of (x^6-x^5-x^4+2x^2)/((1-x^3)(1-x^2)^2(1-x)).at n=48A007988
- Coordination sequence T3 for Zeolite Code AFO.at n=30A008017
- Coordination sequence T2 for Zeolite Code GOO.at n=31A008112
- Six iterations of Reverse and Add are needed to reach a palindrome.at n=41A015984
- Numbers k such that the continued fraction for sqrt(k) has period 24.at n=34A020363
- a(n) = [ 2nd elementary symmetric function of {sqrt(k)} ], k = 1,2,...,n.at n=19A025193
- a(n) = n^2 + n + 8.at n=45A027693
- McKay-Thompson series of class 16B for the Monster group.at n=56A029839
- 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 44.at n=10A031542
- Numbers k such that A102489(k) is divisible by k.at n=11A032563
- Number of ways to partition a 2-colored labeled set into identical subsets.at n=7A038042
- Numbers k such that 7 and 8 occur juxtaposed in the base-10 representation of k but not of k-1.at n=40A043258
- Numbers k such that 7 and 8 occur juxtaposed in the base-10 representation of k but not of k+1.at n=40A044038
- Numbers n such that string 3,6 occurs in the base 8 representation of n but not of n-1.at n=36A044217
- Numbers n such that string 5,8 occurs in the base 9 representation of n but not of n-1.at n=28A044304
- Numbers n such that string 7,8 occurs in the base 10 representation of n but not of n-1.at n=22A044410
- Numbers n such that string 3,6 occurs in the base 8 representation of n but not of n+1.at n=36A044598
- Numbers n such that string 5,8 occurs in the base 9 representation of n but not of n+1.at n=28A044685