Properties of the Number 39920

Thirty-Nine Thousand Nine Hundred Twenty

Basics

Value: 39919 → 39920 → 39921

Parity: even

Prime: No

Previous Prime: 39901

Next Prime: 39929

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ⁴ × 5 × 499

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1001101111110000

Octal: 115760

Duodecimal: 1B128

Hexadecimal: 9bf0

Square: 1593606400

Square Root: 199.79989989987482

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

Principal diagonal of the convolution array A213838. A213839

G.f.: ∑_n>=0 (n+1)*(n+2)*(n+3)/3! * xⁿ * (1 + xⁿ)ⁿ. A326004

a(n) = (-1)ⁿ*(n + 1)*(5·n² + 10·n + 1). A271532

The number of magic quad squares that can be formed using cards from Quads-2ⁿ deck. A361613

Concatenation of the first n decimal digits of e-2. A39920

Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings). A234223

Number of (n+1) X (5+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings). A234224

Number of (n+1) X (6+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings). A234225

Number of (n+1) X (7+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings). A234226