Properties of the Number -2646

Six Hundred Forty-Six

Basics

Value: -2647 → -2646 → -2645

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 7 ²

Divisors: 1, 2, 3, 6, 7, 9, 14, 18, 21, 27

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001010110

Octal: -5126

Duodecimal: -1646

Hexadecimal: -a56

Square: 7001316

Square Root: 51.43928459844674

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

Triangle T(n,k) read by rows giving coefficients in expansion of n! * ∑_i=0..n C(x,i) in descending powers of x. A54651

Irregular triangle read by rows of normalized Girard-Waring formula (cf. A210258), for m=7 data values. A288245

Expansion of (1/x) * Series_Reversion( x / ((1-x)² * (1+x)³) ). A370107

Triangle read by rows. Signed version of A008277. A154959

Triangle read by rows: row n is the expansion of xⁿ in terms of (x+k)!/x! for decreasing k. A213735

Triangle read by rows, inverse Bell transform of second order Bell numbers (A187761). A264431

Triangular array read by rows: row n shows the coefficients of this polynomial of degree n: (1/n!)*(numerator of n-th derivative of 1/(1-3x+x²)). A328645

Signed Stirling numbers of the second kind. A80417

Triangle read by rows, inverse Bell transform of the third-order Bell numbers, T(n,k) for n >= 0 and 0 <= k <= n. A264434

Triangle of Stirling numbers of the second kind, S2(n,k), n >= 1, 1 <= k <= n. A8277