3538
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
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5580
- Proper Divisor Sum (Aliquot Sum)
- 2042
- 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
- 1680
- Möbius Function
- -1
- Radical
- 3538
- Omega Function (Ω)
- 3
- 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
- 56
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Arrays of dumbbells.at n=7A002941
- Coordination sequence T3 for Zeolite Code AET.at n=41A008009
- Coordination sequence for CaF2(1), F position.at n=20A009924
- Numbers k such that the continued fraction for sqrt(k) has period 11.at n=33A020350
- Convolution of natural numbers >= 2 and (F(2), F(3), F(4), ...).at n=12A023550
- Numbers k such that 189*2^k+1 is prime.at n=19A032471
- Concatenation of n and n + 3.at n=34A032608
- a(n) = prime(n)*prime(n+1) - prime(n+1).at n=16A037167
- Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 1,3,2.at n=4A037614
- Number of primes less than 1000n.at n=32A038812
- Numbers m such that m^2 ends in 444.at n=14A039685
- Number of partitions of n with equal number of even and odd parts.at n=42A045931
- Triangle read by rows giving number of arrangements of k dumbbells on 2 X n grid (n >= 0, k >= 0).at n=52A046741
- Number of permutations with certain forbidden subsequences.at n=9A054391
- a(n) = Sum_{d|n} binomial(n,d).at n=13A056045
- a(n) = Sum_{d|n and gcd(d, n/d)=1} binomial(n,d).at n=13A056190
- Engel expansion of 1/e = 0.367879... .at n=29A059193
- Regard A064413 as giving a permutation of the positive integers; sequence gives second infinite cycle, beginning at its smallest term, 73.at n=35A064667
- Numbers whose base-4 and base-5 representations are permutations of the same multiset of digits.at n=14A074233
- A078152(n!).at n=9A078155