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Properties of the Number 28782

Twenty-Eight Thousand Seven Hundred Eighty-Two

Basics

Value: 28781 → 28782 → 28783

Parity: even

Prime: No

Previous Prime: 28771

Next Prime: 28789

Digit Sum: 27

Digital Root: 9

Palindrome: Yes

Factorization: 2 × 3 3 × 13 × 41

Divisors: 1, 2, 3, 6, 9, 13, 18, 26, 27, 39

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111000001101110

Octal: 70156

Duodecimal: 147A6

Hexadecimal: 706e

Square: 828403524

Square Root: 169.6525861871843

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

Triangle read by rows: number of circular permutations of [1..n] with k progressions of rise 1, distance 1 and length 3 (n >= 3, k >= 0). A216718
Palindromes with exactly 6 prime factors (counted with multiplicity). A46332
Final terms of rows of A077529. A77530
Number of successions in all the permutations p of [n] such that p(1)=1 and having no 3-sequences. A succession of a permutation p is a position i such that p(i +1) - p(i) = 1. A180187
Number of 2 X n arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 2 X n array. A220205
Smallest palindrome which requires at least n iterations of Reverse and Add to reach a palindrome. A222533
Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 430", based on the 5-celled von Neumann neighborhood. A272116
Palindromes that can be written in more than one way as the sum of two distinct palindromic primes. A356854
a(n) is the first number that is the sum of two palindromic primes in exactly n ways. A379138
Number of ordered quadruples of integers from [ 2,n ] with no common factors between triples. A15639