3628
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 6356
- Proper Divisor Sum (Aliquot Sum)
- 2728
- 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
- 1812
- Möbius Function
- 0
- Radical
- 1814
- 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
- 56
- 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 k such that 4!*(2k-5)!/(k!*(k-1)!) is an integer.at n=37A004784
- 5!(2n-6)!/n!(n-1)! is an integer.at n=42A004785
- Numbers k such that k^64 + 1 is prime.at n=36A006316
- Coordination sequence T1 for Zeolite Code iRON.at n=42A009881
- A B_2 sequence: a(n) = least value such that the sequence increases and pairwise sums of distinct terms are all distinct.at n=45A010672
- Number of partitions of n into distinct parts, none being 5.at n=54A015750
- Numbers k such that the continued fraction for sqrt(k) has period 80.at n=6A020419
- 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 30.at n=30A031528
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 30 ones.at n=17A031798
- a(n) = Sum_{i=0..n} binomial(i,floor(i/2)).at n=13A036256
- Numbers whose maximal base-6 run length is 4.at n=23A037987
- Coordination sequence T1 for Zeolite Code STT.at n=40A038428
- Coordination sequence T5 for Zeolite Code SFF.at n=40A038436
- Numbers having four 4's in base 6.at n=2A043388
- Internal digits of n^2 include digits of n, n does not end in 0.at n=38A046833
- Internal digits of n^2 include digits of n as subsequence.at n=10A046834
- Internal digits of n^2 include digits of n as subsequence, n does not end in 0.at n=0A046835
- Number of ways to place 3 nonattacking queens on an n X n board.at n=7A047659
- a(n) = Sum_{i=1..n} T(i,n-i), where T is A049615.at n=35A049616
- Numbers n such that 173*2^n-1 is prime.at n=21A050838