8038
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
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 12060
- Proper Divisor Sum (Aliquot Sum)
- 4022
- 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
- 4018
- Möbius Function
- 1
- Radical
- 8038
- Omega Function (Ω)
- 2
- 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
- 26
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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 partitions of n that do not contain 2 as a part.at n=38A027336
- 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 88.at n=21A031586
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 60 ones.at n=14A031828
- Increasing gaps among twin primes: size.at n=40A036063
- Numbers m such that m^2 ends in 444.at n=32A039685
- Base-9 palindromes that start with 1.at n=38A043028
- a(n) = A033001(n)/4.at n=41A043307
- Numbers having four 1's in base 6.at n=31A043376
- Intrinsic 9-palindromes: n is an intrinsic k-palindrome if it is a k-digit palindrome in some base.at n=34A060879
- Number of partitions of n-th composite number not containing the smallest prime factor.at n=24A091094
- Number of partitions of n which contain their signature as a subpartition.at n=33A118052
- Centered 47-gonal numbers.at n=18A129428
- a(n) = 3*A146085(n) - 2.at n=47A146091
- Number of equivalence classes of graphs on n nodes up to sequences of edge local complementation and isomorphism.at n=8A156801
- Positive integers n such that the sum S of 1 and first n^2-1 odd primes is divisible by n and S/n == n (mod 2).at n=16A173079
- a(n) = A002865(2*n-1)+A002865(2*n).at n=18A182845
- Number of strictly increasing arrangements of 5 nonzero numbers in -(n+3)..(n+3) with sum zero.at n=16A188124
- a(0) = 1; for n > 0, a(n) = 41*n^2 + 2.at n=14A206399
- Numbers m such that there is a k with 2^m/(m+1) < binomial(m,k) <= 2^m/m and k < m/2.at n=40A229485
- Number of ones on each row of irregular tables A252743 and A252744.at n=14A252745