Properties of the Number -8420

Four Hundred Twenty

Basics

Value: -8421 → -8420 → -8419

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 421

Divisors: 1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -10000011100100

Octal: -20344

Duodecimal: -4A58

Hexadecimal: -20e4

Square: 70896400

Square Root: 91.76055797563569

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

Convolution square of A255528. A278710

Coefficient array for certain polynomials N(4; k,x) (rising powers in x). A62751

Number of subset-sums of integer partitions of n. A304792

a(n) = n³ + n² + n. A27444

Numbers m such that there are precisely 20 groups of order m. A298911

Numbers k such that k² divides 13^k - 1. A128393

Arrange digits of 2ⁿ in descending order. A28910

Diagonal above the central terms of pendular trinomial triangle A119369, ignoring leading zeros. A119375

Array read by antidiagonals: T(n,k) (n>=1, k>=1) = number of ways to select four points from an n X k grid so that three of them form a triangle of nonzero area and the extra point is on one of the edges of the triangle. A334710

Row sums of triangle A120072 (numerator triangle for H atom spectrum). A120074