Properties of the Number 28982

Twenty-Eight Thousand Nine Hundred Eighty-Two

Basics

Value: 28981 → 28982 → 28983

Parity: even

Prime: No

Previous Prime: 28979

Next Prime: 29009

Digit Sum: 29

Digital Root: 2

Palindrome: Yes

Factorization: 2 × 43 × 337

Divisors: 1, 2, 43, 86, 337, 674, 14491, 28982

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111000100110110

Octal: 70466

Duodecimal: 14932

Hexadecimal: 7136

Square: 839956324

Square Root: 170.2410056361275

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

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order. A204153

E.g.f.: ∑_n>=1 tanh(n·x)ⁿ = ∑_n>=1 a(n)*4^n-1*xⁿ/n!. A195415

G.f.: ∑_n>=0 (x^2·n-1 + 1)ⁿ * xⁿ / (1 + x^2·n+1)ⁿ⁺¹, an even function. A326602

a(1)=a(2)=1. a(n+1) = a(n) + a(smallest prime dividing n). A128216

a(n) is the odd-length palindrome whose digits up to the center are those of n and whose center digit is equal to the digital root of the product of the factorial of n and the reverse of n. A82941

Number of primes between (prime(n + 1))^π and (prime(n))^π. A137380

Number of (n+2) X 4 0..2 arrays with every 3 X 3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order. A204147

Palindromes that can be written in more than one way as the sum of two distinct palindromic primes. A356854

Nonprime base-10 palindromes whose arithmetic derivative is a base-10 palindrome. A363248

Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order. A204145