Properties of the Number -820820

Eight Hundred Twenty Thousand Eight Hundred Twenty

Basics

Value: -820821 → -820820 → -820819

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 × 7 × 11 × 13 × 41

Divisors: 1, 2, 4, 5, 7, 10, 11, 13, 14, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -11001000011001010100

Octal: -3103124

Duodecimal: -337018

Hexadecimal: -c8654

Square: 673745472400

Square Root: 905.9911699348951

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

Triangle read by rows: T(n,k) (0 <= k <= n) gives numerators of coefficients in Nörlund's polynomials D_2n(x). A260327

Partial sums of A007585. A51797

Sums of rows of A077529. A77531

Third right hand column of triangle A163934. A163935

Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 0 vertically. A207714

Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 0 vertically. A207721

a(n) is the least integer that is 4-dimensional pyramidal in exactly n ways. A333932