Properties of the Number 18280

Eighteen Thousand Two Hundred Eighty

Basics

Value: 18279 → 18280 → 18281

Parity: even

Prime: No

Previous Prime: 18269

Next Prime: 18287

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 5 × 457

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 457, 914

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011101101000

Octal: 43550

Duodecimal: A6B4

Hexadecimal: 4768

Square: 334158400

Square Root: 135.20355024924456

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

Indices of primes followed by a gap (distance to next larger prime) of 44. A320720

Number of integer partitions with sum <= n whose distinct parts can be linearly combined using nonnegative coefficients to obtain n. A365379

T(n,k)=Number of length n+3 0..k arrays with no four elements in a row with pattern abab (with a≠b) and new values 0..k introduced in 0..k order. A243044

a(n) = n³ - 2·n² + 2·n + 1. A188947

a(n) = smallest m such that A031131(m) = 2·n. A261525

Number of 4-cycles in the Lucas cube λ(n). A245961

Coefficients of a generalized Jaco-Lucas polynomial (even indices) read by rows. A122076

Expansion of ψ(-x³) / f(-x) in powers of·where ψ(), f() are Ramanujan θ functions. A271593

Area of all nondecreasing Dyck paths of length 2n. A61648

Expansion of (1 - x)^-1/(1 + 2·x - 2·x² + x³). A77918