9388
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 16436
- Proper Divisor Sum (Aliquot Sum)
- 7048
- 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
- 4692
- Möbius Function
- 0
- Radical
- 4694
- 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
- 109
- 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 that are the sum of 9 positive 7th powers.at n=39A003376
- a(0) = 1, a(n) = 26*n^2 + 2 for n>0.at n=19A010016
- a(n) = floor( n*(n-1)*(n-2)/23 ).at n=61A011905
- Number of ordered triples of integers from [ 2,n ] with no global factor.at n=39A015633
- Convolution of natural numbers with composite numbers.at n=30A023539
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 56 ones.at n=15A031824
- T(n,n-4), array T as in A038792.at n=22A038794
- Numbers whose base-5 representation contains exactly three 0's and two 3's.at n=25A045201
- Smallest composite that when added to sum of prime factors reaches a prime after n iterations.at n=35A050710
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 85 ).at n=36A063358
- Values of k such that floor(k*tanh(Pi)) = floor((k+1) tanh(Pi)).at n=34A096613
- Sum over all partitions of n of the sum of the parts that are smaller than the largest part.at n=20A116688
- Number of 7-almost primes 7ap such that 2^n < 7ap <= 2^(n+1).at n=18A120038
- Numbers k for which 16*k+1, 16*k+3 and 16*k+15 are primes.at n=38A123997
- a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks at least one of digits 1,2,3, at least one of digits 4,5,6 and at least one of digits 7,8,9.at n=3A125948
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 1), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.at n=7A150589
- Number of 5-step S, NW and NE-moving king's tours on an n X n board summed over all starting positions.at n=13A187379
- Number of 2 X 2 matrices having all elements in {-n,...n} and determinant 4.at n=23A209988
- a(n) = Sum_{i=0..n} digsum_5(i)^3, where digsum_5(i) = A053824(i).at n=63A231670
- Permutation of natural numbers, odd bisection of A245705 incremented by one and halved: a(n) = (1+A245705((2*n)-1)) / 2.at n=39A245711