Properties of the Number 28441

Twenty-Eight Thousand Four Hundred Forty-One

Basics

Value: 28440 → 28441 → 28442

Parity: odd

Prime: No

Previous Prime: 28439

Next Prime: 28447

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 × 17 × 239

Divisors: 1, 7, 17, 119, 239, 1673, 4063, 28441

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111100011001

Octal: 67431

Duodecimal: 14561

Hexadecimal: 6f19

Square: 808890481

Square Root: 168.64459671154603

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

Primitive numbers in A229307. A229311

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+239)² = y². A204765

Triangle read by rows: matrix product of the binomial coefficients with the Stirling numbers of the second kind. A126350

Triangle read by rows: A008277·A007318. A137597

Odd composite integers m such that A000045(2·m-J(m,5)) == 1 (mod m), where J(m,5) is the Jacobi symbol. A340118

Row sums of A102427. A102429

Triangular numbers congruent to 1 or 5 mod 6. A128880

Weight multiplicities for 248-dimensional irreducible representation of the Lie algebra E₈. A340523

Convolution of natural numbers n >= 1 with Fibonacci numbers F(k), for k >= 6. A37157

A290865(n) -(n-1). A290876