Properties of the Number -5438

Four Hundred Thirty-Eight

Basics

Value: -5439 → -5438 → -5437

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 2719

Divisors: 1, 2, 2719, 5438

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -1010100111110

Octal: -12476

Duodecimal: -3192

Hexadecimal: -153e

Square: 29571844

Square Root: 73.74279625834649

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

L.g.f.: log( ∑_n>=0 x^n² ), the log of the characteristic function of the squares. A162552

Expansion of exp( ∑_n>=1 -sigma₂(3·n)*xⁿ/n ) in powers of x. A283243

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime. A251845

Number of binary strings of length n with equal numbers of 010 and 101 substrings. A164146

Binomial transform of A109747. A153732

Construct sequences P,Q,R by the rules: Q = first differences of P, R = second differences of P, P starts with 1,3,9, Q starts with 2,6, R starts with 4; at each stage the smallest number not yet present in P,Q,R is appended to R. Sequence gives P. A225385

Fourth row of A166091. Positions of 7's in A166086. A166056

a(n) = 4·n² - n - 1. A185950

Number of doublerises in all bargraphs having semiperimeter n (n>=2). A doublerise in a bargraph is any pair of adjacent up steps. A273714

Consider the family of multigraphs enriched by the species of simple graphs. Sequence gives number of those multigraphs with n labeled edges. A99700