Properties of the Number 28961

Twenty-Eight Thousand Nine Hundred Sixty-One

Basics

Value: 28960 → 28961 → 28962

Parity: odd

Prime: Yes

Previous Prime: 28949

Next Prime: 28979

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 28961

Divisors: 1, 28961

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000100100001

Octal: 70441

Duodecimal: 14915

Hexadecimal: 7121

Square: 838739521

Square Root: 170.17931719218996

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

a(n) = n·a(n-1) + 1, a(1) = 0. A56542

Primes of form n² + 28561. A256841

Number of vertices in a complete bipartite graph where the vertices in the two parts are placed on opposite sides of a parabola at integer y coordinates y = 1, 2, ...n. A392442

Primes of the form 41+(n+n²)/2=41+A000217(n). A139219

Total sum of parts <= n of multiplicity 0 in all partitions of n. A213679

Primes p such that 2·p+1 and (2·p)²+(2·p+1)² are also prime. A347110

Engel expansion for (positive) constant defined in A078756. A80230

Primes such that applying "reverse and add" twice produces two more primes. A174402

a(n) = n³ + 2·n² + 5·n + 11. A271779

Primes of the form n³ + 2n² + 5n + 11. A271840