Properties of the Number 39128

Thirty-Nine Thousand One Hundred Twenty-Eight

Basics

Value: 39127 → 39128 → 39129

Parity: even

Prime: No

Previous Prime: 39119

Next Prime: 39133

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 67 × 73

Divisors: 1, 2, 4, 8, 67, 73, 134, 146, 268, 292

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001100011011000

Octal: 114330

Duodecimal: 1A788

Hexadecimal: 98d8

Square: 1531000384

Square Root: 197.80798770524916

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

At stage 1, start with a unit equilateral triangle. At each successive stage add 3*(n-1) new triangles around outside with vertex-to-vertex contacts. Sequence gives number of triangles at n-th stage. A269064

Expansion of x/(1 - 8·x - 3·x²). A15574

Expansion of a modular function. A6709

Number of 2 X n arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 2 X n array. A219628

Intersection of A046346 and (A046346-2). A309310

a(n) = ∑_k=0..n ((2k+1)*C(n,k)*C(n+k,k))², where C(n,k) denotes the binomial coefficient n!/(k!*(n-k)!). A246461

Numbers whose base-10 representation has the same number of 2's and 3's. A39128