3638
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
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5832
- Proper Divisor Sum (Aliquot Sum)
- 2194
- 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
- 1696
- Möbius Function
- -1
- Radical
- 3638
- 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
- 162
- 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
- Number of stacks, or arrangements of n pennies in contiguous rows, each touching 2 in row below.at n=26A001524
- a(n) = 1000*log(n) rounded to the nearest integer.at n=37A004241
- Number of n-node connected graphs without points of degree 2.at n=7A005636
- Sum of the first n primes.at n=43A007504
- Coordination sequence T4 for Zeolite Code GOO.at n=41A008114
- Coordination sequence T1 for Zeolite Code MOR.at n=39A008182
- Coordination sequence T2 for Zeolite Code MOR.at n=39A008183
- Numbers whose sum of divisors is a cube.at n=24A020477
- Sum of first prime(n) primes.at n=13A022094
- Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 16 (most significant digit on right).at n=24A029509
- Numbers having period-1 7-digitized sequences.at n=21A031201
- 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 60.at n=3A031558
- Numbers k such that 85*2^k+1 is prime.at n=16A032392
- Concatenation of n and n + 2 or {n,n+2}.at n=35A032607
- Expansion of Sum_{n>=0} (q^n / Product_{k=1..n+4} (1 - q^k)).at n=24A035300
- Number of partitions of n into parts not of the form 23k, 23k+8 or 23k-8. Also number of partitions with at most 7 parts of size 1 and differences between parts at distance 10 are greater than 1.at n=28A035996
- Number of primes less than 1000n.at n=33A038812
- Number of partitions satisfying cn(2,5) < cn(1,5) + cn(4,5) and cn(3,5) < cn(1,5) + cn(4,5).at n=29A039889
- Composite numbers whose 3 prime factors are distinct in length.at n=28A046443
- Composite numbers arising as sum of first k primes.at n=36A053790