15488
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 33915
- Proper Divisor Sum (Aliquot Sum)
- 18427
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7040
- Möbius Function
- 0
- Radical
- 22
- Omega Function (Ω)
- 9
- 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
- 102
- 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
- yes
- Achilles Number
- yes
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Numbers of the form 2^i * 11^j.at n=37A003596
- Coordination sequence for root lattice B_4.at n=8A022146
- Convolution of (F(2), F(3), F(4), ...) and A000201.at n=15A023653
- a(n) = A027144(2n-1, n-1).at n=6A027148
- a(n) = A027144(n, floor(n/2)).at n=13A027150
- a(n) = binomial(n+2,2) + binomial(n+3,3) + binomial(n+4,4) + binomial(n+5,5).at n=14A027659
- Numbers whose prime factors are 2 and 11.at n=19A033848
- Coordination sequence for lattice D*_88 (with edges defined by l_1 norm = 1).at n=2A035829
- Coordination sequence for diamond structure D^+_88. (Edges defined by l_1 norm = 1.)at n=2A035920
- Composite numbers k such that the digits of the prime factors of k are either 1 or 2.at n=47A036302
- Numbers k that can be expressed as k = w+x = y*z with w*x = k*(y+z) where w, x, y, and z are all positive integers.at n=30A057371
- Numbers k such that sigma(k) - 2k is prime.at n=34A064271
- Least number k such that the square root of {k^2 + (Prime[n + k] - Prime[n])^2} is an integer; or 0 if no such number exists.at n=14A066689
- Numbers k such that the number of divisors of k equals the number of anti-divisors of k.at n=11A073694
- Number of subsets of integers 1 through n (including the empty set) containing no pair of integers that share a common factor.at n=28A084422
- McKay-Thompson series of class 24E for the Monster group.at n=27A112160
- a(n) = period of the sequence {b(m), m>=0}, defined by b(m):=binomial(m+n,n) mod n.at n=43A133900
- a(n) = 8*n^2.at n=44A139098
- Periods of the rows of A144871.at n=43A144872
- Numbers which can be expressed as the product of numbers made of only twos.at n=42A161140