Properties of the Number 18238

Eighteen Thousand Two Hundred Thirty-Eight

Basics

Value: 18237 → 18238 → 18239

Parity: even

Prime: No

Previous Prime: 18233

Next Prime: 18251

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 11 × 829

Divisors: 1, 2, 11, 22, 829, 1658, 9119, 18238

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011100111110

Octal: 43476

Duodecimal: A67A

Hexadecimal: 473e

Square: 332624644

Square Root: 135.04813956511953

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

Numbers k such that k, k + 1 and k + 2 are 3 consecutive Harshad numbers. A154701

Number of time intervals that can be measured off with n ropes and a lighter. A287012

Triangle of coefficients of polynomials v(n,x) jointly generated with A208751; see the Formula section. A208752

Convolution of natural numbers >= 2 and natural numbers >= 3. A23545

Numbers n such that φ(n) = ∑_j=1..k d(n^j) for some k, where φ(n) is the Euler totient function of n and d(n) is the number of divisors of n. A283757

Expansion of 1/(1 - ∑_k>=1 k·x^k/(1 + x^k)). A320651

a(n) = T(n,0) + T(n,1) + ... + T(n,n), T given by A027157. A27164

Numbers n of the form k + reverse(k) for exactly three k. A71914

Diagonal of array A085205. A85228

Smallest positive integer m such that m, m+1, m+2, m+3 are divisible by 2n+1, 2n+3, 2n+5, 2n+7 respectively. A279259