Properties of the Number 18438

Eighteen Thousand Four Hundred Thirty-Eight

Basics

Value: 18437 → 18438 → 18439

Parity: even

Prime: No

Previous Prime: 18433

Next Prime: 18439

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 7 × 439

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 439, 878

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100000000110

Octal: 44006

Duodecimal: A806

Hexadecimal: 4806

Square: 339959844

Square Root: 135.78659727675628

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of starting positions of Nim with 2n pieces such that 2nd player wins. Partitions of 2n such that xor-sum of partitions is 0. A48833

Expected number of random moves in Tower of Hanoi problem with n disks starting with a randomly chosen position and ending at a position with all disks on the same peg. A7798

Number of partitions p of n such that mean(p) > multiplicity(min(p)). A240206

Least k such that k*(2^p-1)*(k*(2^p-1)+1)+1 is prime, where 2^p-1 runs through the Mersenne primes. A137909

Numerators of convergents to Euler-Mascheroni constant. A46114

Nested floor product of n and fractions (k+1)/k for all k>0 (mod 5), divided by 5. A73362

Trails of length n on cubic lattice. A6819

Triangle read by rows, k!*2^k*S₂(n, k) where S_m(n, k) are the Stirling-Frobenius subset numbers of order m; n >= 0, k >= 0. A225476

Number of different coefficient values in expansion of ∏_k=1..n (1+x^k²). A369786

Least positive integer k < n such that n + k + 2^k is prime, or 0 if such an integer k does not exist. A231725