Properties of the Number 28182

Twenty-Eight Thousand One Hundred Eighty-Two

Basics

Value: 28181 → 28182 → 28183

Parity: even

Prime: No

Previous Prime: 28181

Next Prime: 28183

Digit Sum: 21

Digital Root: 3

Palindrome: Yes

Factorization: 2 × 3 × 7 × 11 × 61

Divisors: 1, 2, 3, 6, 7, 11, 14, 21, 22, 33

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111000010110

Octal: 67026

Duodecimal: 14386

Hexadecimal: 6e16

Square: 794225124

Square Root: 167.87495346239118

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

Nonzero coefficients of the Swiss-Knife polynomials for the computation of Euler, tangent, and Bernoulli numbers (triangle read by rows). A153641

Triangle read by rows: T(n, k) = (-2)^k*binomial(n, k)*Euler(k, 1/2). A81658

a(n) is the number of pairs (x,y) where·is plane partition of n+1 and y is a plane partition of n and·covers y. A90984

Palindromic Smith numbers. A98834

Palindromes with exactly 5 prime factors (counted with multiplicity). A46331

Consider the Diophantine equation x³ + y³ = z³ - 1 (x < y < z) or 'Fermat near misses'. Arrange solutions by increasing values of z. Sequence gives values of x. A50788

Triangle, read by rows, equal to the matrix inverse of triangle A103327, where A103327(n,k) = binomial(2·n+1,2·k+1). A104033

Palindromes that are the product of 5 distinct primes. A46395

Products of 5 distinct primes that are sandwiched between twin prime numbers. A376380

Number of ascent sequences of length n with exactly six flat steps. A242159