Properties of the Number 18240

Eighteen Thousand Two Hundred Forty

Basics

Value: 18239 → 18240 → 18241

Parity: even

Prime: No

Previous Prime: 18233

Next Prime: 18251

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ⁶ × 3 × 5 × 19

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100011101000000

Octal: 43500

Duodecimal: A680

Hexadecimal: 4740

Square: 332697600

Square Root: 135.05554412907307

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

a(n) = n*(n+2)*(n-2)/3. A77415

Level of the n-th plateau of the column k of the square array A195825, when k -> infinity. A210843

Number of ways to change three non-identical letters in the word aabbccdd..., where there are n types of letters. A102860

Number of ways to write n as an ordered sum of 10 squares of positive integers. A340947

Expansion of ∑_k>0 x^2·k/(1-x^k)⁴. A363604

Triangle T(n,k) = Number of k-cycles on the graph of an n-orthoplex. n>=2, k>=3. A167986

a(n) = (prime(n)² - 1)/2 for n >= 2. A216244

Numbers k such that k³ has only even digits. A52004

Numbers with prime factorization pqrs⁶. A190292

Number of (undirected) Hamiltonian paths in the graph C₃ X C_n. A339797