Properties of the Number 2040

Two Thousand Forty

Basics

Value: 2039 → 2040 → 2041

Parity: even

Prime: No

Previous Prime: 2039

Next Prime: 2053

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 2 ³ × 3 × 5 × 17

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 11111111000

Octal: 3770

Duodecimal: 1220

Hexadecimal: 7f8

Square: 4161600

Square Root: 45.16635916254486

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) = n*(n+1)*(n+2)/2. A27480

Sums of twin prime pairs. A54735

Numbers k such that σ(k) > 3·k. A68403

Multiples of 20 containing a 20 in their decimal representation. A121040

a(n) = prime(n+1)² - prime(n)². A69482

Triangle read by rows: T(n,k) (n >= 0, 0 <= k <= n) gives number of {0,1} n X n matrices with all row and column sums equal to k. A8300

Number of n-step closed paths on hexagonal lattice. A2898

Numbers k such that σ(k) >= 3·k. A23197

Triangle T(n,k) = k! * Stirling1(n,k), 1<=k<=n. A48594

Number of n X n matrices with exactly 2 1's in each row and column, other entries 0. A1499