Properties of the Number -28304

Twenty-Eight Thousand Three Hundred Four

Basics

Value: -28305 → -28304 → -28303

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ⁴ × 29 × 61

Divisors: 1, 2, 4, 8, 16, 29, 58, 61, 116, 122

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110111010010000

Octal: -67220

Duodecimal: -14468

Hexadecimal: -6e90

Square: 801116416

Square Root: 168.23792675850473

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) = ((4+sqrt(3))*(8+2·sqrt(3))ⁿ-(4-sqrt(3))*(8-2·sqrt(3))ⁿ)/(2·sqrt(3)). A161729

Numbers k such that k divides the (left) concatenation of all numbers <= k written in base 15 (most significant digit on right and removing all least significant zeros before concatenation). A29532

Numbers k such that 8k+1, 12k+1 and 24k+1 are primes and the last two are also of the form x² + 27y², so the tetrahedral number T(24k+1) is a Fermat pseudoprime to base 2. A321867

Array read by downward antidiagonals: A(n,k) = A(n-1,k+1) + (k+1)*∑_j=0..k binomial(k, j)*A(n-1,j) with A(0,k) = 1, n >= 0, k >= 0. A370382