Properties of the Number -2684

Six Hundred Eighty-Four

Basics

Value: -2685 → -2684 → -2683

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 11 × 61

Divisors: 1, 2, 4, 11, 22, 44, 61, 122, 244, 671

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: -101001111100

Octal: -5174

Duodecimal: -1678

Hexadecimal: -a7c

Square: 7203856

Square Root: 51.807335387954474

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: T(n,k) (0 <= k <= n) gives numerators of coefficients in Nörlund's polynomials D_2n(x). A260327

Expansion of g.f.: 1/(∑_{p odd prime} x^p)² (even powers only). A351317

a(n) = -n² - n + 72. A110678

Numbers n such that Bernoulli number B_n has denominator 690. A272186

Years in which there are five Fridays in the month of February. A141287

Numbers m such that there are precisely 11 groups of order m. A249554

a(n) = n*(n+17). A132761

Numbers k such that k² is palindromic in base 3. A29984

Initial values for iteration of A063919(x) function such that iteration ends in a 2-cycle, i.e., "attracted" by unitary amicable numbers, A063991. A97037

Number of integer partitions of n whose odd parts have a common divisor > 1. A366842