16388
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
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 30492
- Proper Divisor Sum (Aliquot Sum)
- 14104
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7680
- Möbius Function
- 0
- Radical
- 8194
- Omega Function (Ω)
- 4
- 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
- 115
- 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 5 positive 7th powers.at n=21A003372
- Numbers that are the sum of 12 positive 11th powers.at n=8A004823
- a(n) = (n/2)*(n^4 + 1).at n=8A021003
- a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = A001950 (upper Wythoff sequence).at n=29A024689
- s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ], s = A001950 (upper Wythoff sequence).at n=28A025122
- Average theta series of odd unimodular lattices of dimension 10 (multiplied by 5).at n=4A029812
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 64.at n=3A031742
- Smallest number > 1 equal to sum of n-th powers of its base-3 digits, or 0 if no such number exists (written in base 10).at n=11A033835
- Decimal part of cube root of a(n) starts with 4: first term of runs.at n=24A034130
- Sums of 2 distinct powers of 4.at n=22A038470
- Base-8 palindromes that start with 4.at n=18A043024
- Sums of two powers of 4.at n=29A055236
- Numbers k such that k | sigma_8(k).at n=18A055712
- a(n) = 4*n^3 + 4.at n=16A100214
- Bitwise XOR of adjacent terms of A101120; also the nonzero terms of A101122.at n=11A101121
- a(n) = A102371(n) + n. Or, 2*A103745.at n=14A105024
- Triangle read by rows: T(n,k) = n*(1+n^k)/2, 0<=k<=n.at n=40A108396
- Index of the occurrence of n in A113698.at n=54A113699
- a(n) = n_{2^n}.at n=13A122624
- A106486-encodings of combinatorial games with value 2.at n=16A125995