Properties of the Number 40128

Forty Thousand One Hundred Twenty-Eight

Basics

Value: 40127 → 40128 → 40129

Parity: even

Prime: No

Previous Prime: 40127

Next Prime: 40129

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ⁶ × 3 × 11 × 19

Divisors: 1, 2, 3, 4, 6, 8, 11, 12, 16, 19

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001110011000000

Octal: 116300

Duodecimal: 1B280

Hexadecimal: 9cc0

Square: 1610256384

Square Root: 200.31974440878264

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

In the interior of a regular 2n-gon with all diagonals drawn, the number of points where exactly three diagonals intersect. A101363

Numbers with prime factorization pqrs⁶. A190292

Numbers k such that in a rotated-square spiral with positive integers (A215468) among k's eight nearest neighbors five or more are primes. A215471

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 241", based on the 5-celled von Neumann neighborhood. A280143

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 470", based on the 5-celled von Neumann neighborhood. A288496

Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w²>x²+y². A211631

Number of (n+1) X (1+1) 0..2 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors. A239171

a(n) = A000041(n) * A000009(n). A304991

Numerator sequence of mean length of certain stackings of n+1 squares on a double staircase. A55245

Triangle T(n, k) = n*( (n-1)! - (k-1)! ), read by rows. A137259