Properties of the Number 2080

Two Thousand Eighty

Basics

Value: 2079 → 2080 → 2081

Parity: even

Prime: No

Previous Prime: 2069

Next Prime: 2081

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ⁵ × 5 × 13

Divisors: 1, 2, 4, 5, 8, 10, 13, 16, 20, 26

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100000100000

Octal: 4040

Duodecimal: 1254

Hexadecimal: 820

Square: 4326400

Square Root: 45.60701700396552

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=1..n k·floor(n/k); also ∑_k=1..n σ(k) where σ(n) = sum of divisors of n (A000203). A24916

Second hexagonal numbers: a(n) = n*(2·n + 1). A14105

Numbers of the form 2^n-1*(2^n·m-1)/(2ⁿ-1), n >= 1, m >= 1. A272919

Number of (n-1)-bead black-white reversible strings; also binary grids; also row sums of Losanitsch's triangle A034851; also number of caterpillar graphs on n+2 vertices. A5418

Sums of two distinct powers of 2. A18900

a(n) = 2^n-1*(1+2ⁿ). A7582

Rhombic matchstick numbers: a(n) = n*(3·n+2). A45944

Centered 9-gonal (also known as nonagonal or enneagonal) numbers. Every third triangular number, starting with a(1)=1. A60544

Numbers that are divisible by exactly 7 primes counting multiplicity. A46308

a(n) = n²*(n² + 1)/2. A37270