Properties of the Number -1938

Nine Hundred Thirty-Eight

Basics

Value: -1939 → -1938 → -1937

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 17 × 19

Divisors: 1, 2, 3, 6, 17, 19, 34, 38, 51, 57

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11110010010

Octal: -3622

Duodecimal: -1156

Hexadecimal: -792

Square: 3755844

Square Root: 44.02272140611028

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, read by rows of n² terms, where row n equals the coefficients in the series reversion of the function G(y,n)-1 such that: y = ∑_m>=1 1/G(y,n)^2·n*m * ∏_k=1..m (1 - 1/G(y,n)^2·k-1). A214690

Expansion of (1/x) * Series_Reversion( x * (1-x+x²)² ). A368969

G.f.: ∏_k>0 (1 - x^k)⁴ * (1 - (-x)^k)⁸. A225543

Expansion of ∏_j>=1 (1 - x^j)/(1 - x^3·j)³. A286952

Determinants of 2 X 2 matrices of non-overlapping blocks of 4 consecutive primes. A117027

E.g.f.: log(1 - log(1 - x) * exp(x)). A345454

Expansion of B(x)², where B(x) is the g.f. of A108482. A373419

a(n) = binomial(n+3, 3)/4 for odd n, n*(n+2)*(n+4)/24 for even n. A6918

Products of exactly four distinct primes. A46386

Number of ways to choose a strict partition of each part of a strict partition of n. A279785