1862
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
- 4
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 3420
- Proper Divisor Sum (Aliquot Sum)
- 1558
- 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
- 756
- Möbius Function
- 0
- Radical
- 266
- Omega Function (Ω)
- 4
- 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
- 37
- 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
- 2nd differences are periodic.at n=31A002082
- Number of 4-connected 4-regular polyhedra with n nodes.at n=12A007023
- Unique period lengths of primes mentioned in A007615.at n=42A007498
- Coordination sequence T2 for Zeolite Code NON.at n=26A008213
- Coordination sequence T4 for Zeolite Code TON.at n=27A008244
- Expansion of e.g.f. cos(sin(x)*exp(x)).at n=7A009048
- Coordination sequence for Ni2In, Position Ni2.at n=13A009942
- a(n) = floor( n*(n-1)*(n-2)/23 ).at n=36A011905
- Expansion of 1/(1-x^10-x^11-x^12-x^13-x^14-x^15-x^16-x^17).at n=63A017893
- Coordination sequence T1 for Zeolite Code CZP.at n=28A019456
- Expansion of Product_{m>=1} (1+m*q^m)^-19.at n=4A022711
- Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-7).at n=18A023437
- Numbers with exactly 5 2's in their ternary expansion.at n=35A023703
- Coordination sequence T3 for Zeolite Code MWW.at n=29A024988
- Numbers that are the sum of 4 distinct positive cubes in exactly 2 ways.at n=16A025409
- Numbers that are the sum of 4 distinct positive cubes in 2 or more ways.at n=17A025412
- Numbers whose square is a difference between 2 positive cubes in at least one way.at n=27A038597
- Number of primes less than 1000n.at n=15A038812
- Ruth-Aaron numbers (2): sum of prime divisors of n = sum of prime divisors of n+1 (both taken with multiplicity).at n=9A039752
- Numerators of continued fraction convergents to sqrt(996).at n=6A042928