11398
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 17640
- Proper Divisor Sum (Aliquot Sum)
- 6242
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5520
- Möbius Function
- -1
- Radical
- 11398
- 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
- 68
- 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
- Numbers such that ten iterations of Reverse and Add are needed to reach a palindrome.at n=25A015991
- a(n) = least m such that if r and s in {1/1, 1/3, 1/5, ..., 1/(2n-1)} satisfy r < s, then r < k/m < (k+2)/m < s for some integer k.at n=46A024841
- Number of mobiles (circular rooted trees) with n nodes and 8 leaves.at n=5A055346
- Numbers which need ten 'Reverse and Add' steps to reach a palindrome.at n=24A065215
- Numbers k such that (k, sigma(k)) lies on a circle with integral radius centered at the origin, i.e., k^2 + sigma(k)^2 is a square.at n=18A066764
- Numbers k such that 7*10^k + R_k + 8 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=11A103051
- Dropping first and last digit of n leaves its largest prime factor.at n=40A114565
- Composite numbers, not ending with 0, sharing a 3-digit sequence with some of its prime factors.at n=7A131523
- Total area of the bounding boxes of all integer partitions of n.at n=17A182094
- a(n) = (n^3 - 2*n^2 + 3*n + 2)/2.at n=29A189890
- Sum of smallest parts of all partitions of n into an odd number of parts.at n=36A222044
- Coordination sequence for (3,4,4) tiling of hyperbolic plane.at n=18A265075
- Numbers m such that there exists a j for which m = Sum_{k=1..j} (m mod k), where k runs through the largest j primes less than m.at n=28A274422
- Number of partitions of the n-th tetrahedral number into tetrahedral numbers.at n=10A298269
- Number of partitions of 2n into exactly n nonzero decimal palindromes.at n=39A319454