Properties of the Number -395

Three Hundred Ninety-Five

Basics

Value: -396 → -395 → -394

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 79

Divisors: 1, 5, 79, 395

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110001011

Octal: -613

Duodecimal: -28B

Hexadecimal: -18b

Square: 156025

Square Root: 19.87460691435179

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

Expansion of ψ(x) / φ(x) in powers of·where φ(), ψ() are Ramanujan θ functions. A83365

Values of n such that L(1) and N(1) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A226921

The r-th term of the n-th row of the following array contains the sum of r successively decreasing integers beginning from n. 0 < r <= n. Sequence contains the leading diagonal. A110427

Expansion of ∏_k>=1 1/(1 + x^k)^k*(k+1/2). A294846

a(n) = ∑_i=0..n-1 K(i,n)*i, where K(,) is Kronecker symbol. A228131

Sum of A341530 and its Dirichlet inverse. A346236

a(n) = ∑_k=0..n A105595(k)*(-1)^k*A105595(n-k) (interpolated zeros suppressed). A105596

The r-th term of the n-th row of the following array contains the sum of r successively decreasing integers beginning from n. 0<r<=n. e.g. the row corresponding to 4 contains 4, (3+2),{(1) +(0)+(-1)}, {(-2)+(-3)+(-4)+(-5)} ----> 4,5,0,-14 1 2 1 3 3 -3 4 5 0 -14 5 7 3 -10 -35 6 9 6 -6 -30 -69 ... Sequence contains the array by rows. A110425

a(n) = floor(d(n)/18^n-1) where d(n) = 0, 1, -8, 352, -5120,.. and d(n) = -8·d(n-1) +288·d(n-2). A174427

Difference between sums of quadratic residues and non-residues modulo n that are coprime to n. A255643