Properties of the Number -19878

Nineteen Thousand Eight Hundred Seventy-Eight

Basics

Value: -19879 → -19878 → -19877

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 3313

Divisors: 1, 2, 3, 6, 3313, 6626, 9939, 19878

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110110100110

Octal: -46646

Duodecimal: -B606

Hexadecimal: -4da6

Square: 395134884

Square Root: 140.98936130077334

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

p[n_, k_]=Product[(E/(2-E))ⁱ, {i, 1, n}]/Product[(E/(2-E))ⁱ, {i, Floor[n/2^k], n}], a(n) = Sum[Floor[p[n, k]/(8·p[n-1, k])], {k, 1, 8}]. A88663

Numbers n such that φ(n) = φ(n-1) - φ(n-2). A66231

Number of partitions of n objects of 2 colors with parts size >1. A60285