Properties of the Number 40428

Forty Thousand Four Hundred Twenty-Eight

Basics

Value: 40427 → 40428 → 40429

Parity: even

Prime: No

Previous Prime: 40427

Next Prime: 40429

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 1123

Divisors: 1, 2, 3, 4, 6, 9, 12, 18, 36, 1123

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001110111101100

Octal: 116754

Duodecimal: 1B490

Hexadecimal: 9dec

Square: 1634423184

Square Root: 201.06715296139248

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

T(n,k)=Number of nXk 0..3 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order. A222500

Number of vertices in a "frame" of size n X n (see Comments in A331776 for definition). A332598

Number of line segments connecting exactly 4 points in an n·n grid of points. A177720

Number of nX3 0..3 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order. A222495

Number of partitions satisfying cn(0,5) < cn(1,5) + cn(2,5) + cn(3,5) and cn(0,5) < cn(4,5) + cn(2,5) + cn(3,5). A39847

Least positive integer k <= n such that 2^k + (n - k) is prime, or 0 if such an integer k does not exist. A231557

Continued fraction for sqrt(450). A40428

Rectangular array A read by upward antidiagonals in which the entry in row n and column k is defined by A(n,k) = A254067(n,k) - A257499(n,k), n,k >= 1. A254131