5662
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
- 9000
- Proper Divisor Sum (Aliquot Sum)
- 3338
- 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
- 2664
- Möbius Function
- -1
- Radical
- 5662
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 36
- 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
- 10-gonal (or decagonal) numbers: a(n) = n*(4*n-3).at n=38A001107
- Pseudoprimes to base 5.at n=12A005936
- E.g.f. log(1+log(1+tanh(x))).at n=7A009311
- Pseudoprimes to base 17.at n=22A020145
- Pseudoprimes to base 39.at n=16A020167
- Pseudoprimes to base 63.at n=20A020191
- Pseudoprimes to base 73.at n=49A020201
- Pseudoprimes to base 85.at n=42A020213
- Every prefix prime in base 7 (written in base 7).at n=17A024767
- a(n) = T(n,n) + T(n,n+1) + ... + T(n,2n), T given by A027113.at n=8A027129
- Even 10-gonal (or decagonal) numbers.at n=19A028994
- Denominators of continued fraction convergents to sqrt(246).at n=9A041461
- Values of i such that phi(x) = 4i+2 has 4 solutions.at n=10A051479
- Write fundamental unit for real quadratic field of discriminant n as x + y*omega; sequence gives values of y for n == 2 mod 4.at n=50A053374
- McKay-Thompson series of class 34A for Monster.at n=35A058638
- Integers whose set of prime factors (taken with multiplicity) uses each digit exactly once (i.e., is pandigital) in some base b > 1. Numbers are expressed in base 10.at n=29A058760
- Binomial transform of reflected pentanacci numbers A074062: a(n) = Sum_{k=0..n} binomial(n,k)*A074062(k).at n=16A074825
- a(n) = (2*n^3 - n^2 - n + 2)/2.at n=18A081441
- a(n) = n-th multiple of n with digit sum n.at n=18A082260
- Even pseudoprimes to base 5.at n=2A090082