Properties of the Number -980

Nine Hundred Eighty

Basics

Value: -981 → -980 → -979

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 7 ²

Divisors: 1, 2, 4, 5, 7, 10, 14, 20, 28, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1111010100

Octal: -1724

Duodecimal: -698

Hexadecimal: -3d4

Square: 960400

Square Root: 31.304951684997057

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) = ∑_k=0..n-1 9^k*B(k)*binomial(n,k) where B(k) is the k-th Bernoulli number. A83013

Triangle read by rows, inverse Bell transform of Bell numbers. A264429

Irregular triangle read by rows of normalized Girard-Waring formula (cf. A210258), for m=8 data values. A288188

Expansion of g.f. A(x) satisfying ∑_n>=0 ∏_k=1..n (x^k + 3·A(x)) = 1 + 4*∑_n>=1 x^n*(n+1/2). A370143

a(n) = A000730(7·n). A282941

Irregular triangle read by rows: T(n,k) (n>=1, 0<=k<=n(n-1)/2) is such that Sum_k T(n,k)*q^k gives the expectation of the number of connected components in a random graph on n labeled vertices where every edge is present with probability q. A125210

Numerator of Bernoulli(n, 1/9). A158807

Triangle of Hankel transforms of certain binomial sums. A120257

Totally multiplicative sequence with a(p) = 7*(p-3) for prime p. A167317

Inverse binomial transform of number triangle A105632. A105847