Properties of the Number 28203

Twenty-Eight Thousand Two Hundred Three

Basics

Value: 28202 → 28203 → 28204

Parity: odd

Prime: No

Previous Prime: 28201

Next Prime: 28211

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 17 × 79

Divisors: 1, 3, 7, 17, 21, 51, 79, 119, 237, 357

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111000101011

Octal: 67053

Duodecimal: 143A3

Hexadecimal: 6e2b

Square: 795409209

Square Root: 167.9374883699289

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

Number A(n,k) of k-dimensional lattice walks from {n}^k to {0}^k using steps that decrease the Euclidean distance to the origin and that change each coordinate by at most 1; square array A(n,k), n>=0, k>=0, read by antidiagonals. A347811

Indices n such that the 3 X 3 matrix with components (row by row) prime(n+k), 0 <= k <= 8, has zero determinant. A117345

Triangular numbers with sum of digits = 15. A68130

a(n) is the number of paths in the Z X Z grid joining (0,0) and (n,n) each of whose steps increases the Euclidean distance to the origin and has coordinates with absolute value at most 1. A346539

a(n) = number of isogeny classes of abelian surfaces over the finite field of order prime(n). A362198

Triangular numbers with internal digits also forming a triangular number. A69702

Hexagonal numbers for which both the sum of the digits and the product of the digits are also hexagonal numbers. A117064

a(n) = 441·n² - 21. A145678

a(n) = 64·n² - n. A157948

Number of 2 X 2 matrices M with all terms in {1,...,n} and permanent(M) >= n. A212240