Properties of the Number -7480

Four Hundred Eighty

Basics

Value: -7481 → -7480 → -7479

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 5 × 11 × 17

Divisors: 1, 2, 4, 5, 8, 10, 11, 17, 20, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

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Representations

Binary: -1110100111000

Octal: -16470

Duodecimal: -43B4

Hexadecimal: -1d38

Square: 55950400

Square Root: 86.48699324175861

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

E.g.f. A = A(x,y) satisfies: A² + B² + C² = 1 + y² and A³ + B³ + C³ = 1 + y³, where functions B = B(x,y) and C = C(x,y) are described by A278886 and A278887, respectively. A278885

Central terms of triangle A278885: a(n) = A278885(n,n+1) = -A278885(n,n) for n>=1. A278888

Expansion of 1/(theta₃(q) * theta₃(q²) * theta₃(q³)), where theta₃() is the Jacobi θ function. A320070

Numbers k such that k² divides 9^k - 1. A127101

Numbers k such that k³ divides 9^k² - 1. A177909

Position in A356226 of first appearance of the n-th composition in standard order (row n of A066099). A356603

Triangle T(r,n) read by rows: number of n X n (0,1)-matrices with exactly r entries equal to 1 and no zero row or columns. A104601

Smallest positive number that can be written as sum of distinct Fibonacci numbers in n ways. A13583

a(n) = (2·n + 1)*(5·n + 1). A33571

Number of locally disjoint enriched p-trees of weight n. A331687