Properties of the Number -655360

Six Hundred Fifty-Five Thousand Three Hundred Sixty

Basics

Value: -655361 → -655360 → -655359

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ¹⁷ × 5

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10100000000000000000

Octal: -2400000

Duodecimal: -277314

Hexadecimal: -a0000

Square: 429496729600

Square Root: 809.5430810031052

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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 T, read by rows, where matrix power T² has 2·4ⁿ in the secondary diagonal: [T²](n+1,n) = 2·4ⁿ, with all 1's in the main diagonal and zeros elsewhere. A117258

Triangular sequence of coefficients of T_n(2ⁿ*x) where T_n is the n-th Chebyshev polynomial. A139037

Number of 1's in all compositions of n+1. A45623

a(n) = 5·2ⁿ. A20714

Products of exactly 18 primes (generalization of semiprimes). A69279

Numbers of form 4ⁱ*10^j, with i, j >= 0. A25621

Numbers of the form 2^k or 5·2^k. A94958

Binary expansion is 1x100...0 where x = 0 or 1. A70875

Expansion of g.f.: (1+x²)/(1-2·x). A84215

a(1) = 2, a(2) = 3; thereafter a(n) is the sum of all the previous terms. A257113