1700
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 18
- Divisor Sum
- 3906
- Proper Divisor Sum (Aliquot Sum)
- 2206
- 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
- 640
- Möbius Function
- 0
- Radical
- 170
- Omega Function (Ω)
- 5
- 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
- 60
- 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
- Numbers that are the sum of 2 squares in exactly 3 ways.at n=16A000443
- a(n) = sigma_2(n): sum of squares of divisors of n.at n=38A001157
- Squares written in base 9.at n=35A002442
- The maximal number of partitions of {1..2n} that are invariant under a permutation consisting of n 2-cycles, and which have the same number of nonempty parts.at n=6A002873
- a(n) = 10*binomial(2*n + 1, n - 4)/(n + 6).at n=4A003519
- a(n) = n*(n+5)*(n+6)*(n+7)/24.at n=10A005587
- Number of minimal unavoidable n-celled pebbling configurations.at n=8A007901
- Coordination sequence T1 for Zeolite Code AFY.at n=34A008029
- Coordination sequence T4 for Zeolite Code MFI.at n=26A008167
- a(n) = (2*n - 3)n^2.at n=10A015238
- Number of ordered triples of integers from [ 1,n ] with no common factors between pairs.at n=31A015632
- Numbers k such that phi(k) + 11 | sigma(k).at n=6A015804
- Coordination sequence T8 for Zeolite Code TER.at n=28A016440
- Numerator of sum of -2nd powers of divisors of n.at n=38A017667
- Sum of gcd(x, y) for 1 <= x, y <= n.at n=26A018806
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MTW = ZSM-12 Nan[AlnSi28-nO56] starting with a T3 atom.at n=10A019197
- Numbers whose base-7 representation is the juxtaposition of two identical strings.at n=33A020335
- Positive numbers k such that k and 4*k are anagrams in base 9 (written in base 9).at n=6A023081
- Numbers with exactly 6 2's in their ternary expansion.at n=2A023704
- Theta series of A*_9 lattice.at n=36A023921