Properties of the Number 40280

Forty Thousand Two Hundred Eighty

Basics

Value: 40279 → 40280 → 40281

Parity: even

Prime: No

Previous Prime: 40277

Next Prime: 40283

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 5 × 19 × 53

Divisors: 1, 2, 4, 5, 8, 10, 19, 20, 38, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001110101011000

Octal: 116530

Duodecimal: 1B388

Hexadecimal: 9d58

Square: 1622478400

Square Root: 200.69877926883362

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

a(n) = 5·a(n-1) + 4·a(n-2) with a(1)=5, a(2)=4. A189748

a(n) is the concatenation of n and 7n. A9441

Number of permutations of length n such that at least one absolute difference between consecutive elements has a distinct partner. A84894

Sum of the areas of the squares on the sides of the distinct rectangles that can be made with positive integer sides such that L + W = n, W < L. A294473

Numbers k such that k*∑_d∣k 1/σ(d) is an integer. A69166

Bond series for first parallel moment of Kagome lattice. A120546

Number of -n..n arrays x(0..3) of 4 elements with zero sum and no two or three adjacent elements summing to zero. A200431

Continued fraction for sqrt(298). A40280