2873
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 3294
- Proper Divisor Sum (Aliquot Sum)
- 421
- 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
- 2496
- Möbius Function
- 0
- Radical
- 221
- Omega Function (Ω)
- 3
- 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
- 172
- 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
- no
- Odd
- yes
Appears in sequences
- Numbers that are the sum of 2 squares in exactly 3 ways.at n=28A000443
- a(n) = n*(5*n - 1)/2.at n=34A005476
- Positions of remoteness 6 in Beans-Don't-Talk.at n=38A005694
- Coordination sequence T2 for Zeolite Code DOH.at n=33A008079
- Coordination sequence T3 for Zeolite Code EMT.at n=44A008088
- Coordination sequence T4 for Zeolite Code MTT.at n=33A008192
- A B_2 sequence: a(n) = least value such that the sequence increases and pairwise sums of distinct terms are all distinct.at n=41A010672
- a(n) = (2*n - 9)*n^2.at n=13A015243
- Number of ordered quadruples of integers from [ 1,n ] with no common factors between triples.at n=16A015635
- Expansion of 1/((1-5*x)*(1-12*x)).at n=3A016166
- Pseudoprimes to base 70.at n=20A020198
- Number of partitions of n into 6 unordered relatively prime parts.at n=38A023026
- Numbers that are the sum of 2 nonzero squares in exactly 3 ways.at n=26A025286
- Numbers that are the sum of 2 nonzero squares in 3 or more ways.at n=34A025294
- Numbers that are the sum of 2 distinct nonzero squares in exactly 3 ways.at n=25A025304
- Numbers that are the sum of 2 distinct nonzero squares in 3 or more ways.at n=33A025313
- Nonsquarefree k such that Pell equation x^2 - k*y^2 = -1 is soluble.at n=25A031397
- Partition n labeled elements into sets of different sizes and order the sets.at n=8A032011
- Numbers k whose decimal representation, read as a base-23 value and divided by k, yields an integer.at n=18A032577
- Products p^3 or p^2*q, where {p,q} are consecutive primes.at n=16A033477