Properties of the Number -7890

Eight Hundred Ninety

Basics

Value: -7891 → -7890 → -7889

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 263

Divisors: 1, 2, 3, 5, 6, 10, 15, 30, 263, 526

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1111011010010

Octal: -17322

Duodecimal: -4696

Hexadecimal: -1ed2

Square: 62252100

Square Root: 88.82567196480981

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

G.f. (1-x)/(2·sqrt(5·x² + 2·x + 1)) - 1/2. A249908

Q-toothpick sequence (see Comments for precise definition). A187210

Icosahedral numbers: a(n) = n*(5·n² - 5·n + 2)/2. A6564

Coefficients in expansion of ∑_{n >= 1} xⁿ/(1-xⁿ)⁴. A59358

a(n) = ∑_i=1..n binomial(i+5,6)². A86027

Numbers k such that k and k + 1 are both lazy-Lucas-Niven numbers (A351719). A351720

Number of nonnegative integer solutions to n = ∑_i=1..n (a_i + b_i), with b_i even. A348410

a(n) is an n-digit number with digits in increasing order with 0 following 9 and this is maintained in the concatenation of any number of consecutive terms. A62273

Numbers in which each digit is the (immediate) successor of the previous one (if it exists) and 0 is considered the successor of 9. A59043

Second accumulation array, T, of the natural number array A000027, by antidiagonals. A185507