Properties of the Number 23428

Twenty-Three Thousand Four Hundred Twenty-Eight

Basics

Value: 23427 → 23428 → 23429

Parity: even

Prime: No

Previous Prime: 23417

Next Prime: 23431

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5857

Divisors: 1, 2, 4, 5857, 11714, 23428

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101101110000100

Octal: 55604

Duodecimal: 11684

Hexadecimal: 5b84

Square: 548871184

Square Root: 153.06207890917986

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

Absolute discriminants of complex quadratic fields with 3-class group of elementary abelian type (3,3) of rank 2. A242863

Absolute discriminants of complex quadratic fields with 3-class rank 2. A242862

Absolute discriminants of complex quadratic fields with 3-class group of type (3,3), 3-principalization type (4443), IPAD [(3,3,3)³, (3,9)], and Hilbert 3-class field tower of unknown length at least 3. A242873

Numbers that are the sum of eight fourth powers in exactly nine ways. A345841

a(n) = n³ - (n+2)². A153258

Numbers that cannot be expressed as a sum of 2 triangular numbers and a power of 2. A112665

Number of n X 5 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and rows and columns lexicographically nondecreasing. A229442

Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) whose second 3-class group is located on the sporadic part of the coclass graph G(3,2) outside of coclass trees. A247691

T(n,k)=Number of nXk 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and rows and columns lexicographically nondecreasing. A229445

Generalized Catalan Numbers x⁴*A(x)² -(1-x+x⁴+x⁵)*A(x) +1 =0. A23428