Properties of the Number 48640

Forty-Eight Thousand Six Hundred Forty

Basics

Value: 48639 → 48640 → 48641

Parity: even

Prime: No

Previous Prime: 48623

Next Prime: 48647

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ⁹ × 5 × 19

Divisors: 1, 2, 4, 5, 8, 10, 16, 19, 20, 32

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1011111000000000

Octal: 137000

Duodecimal: 24194

Hexadecimal: be00

Square: 2365849600

Square Root: 220.54478003344354

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=0..floor(3·n/8)} binomial(k,3·n-8·k). A392272

Number of singular 2 X 2 matrices over Z(n) (i.e., with determinant = 0). A20478

House numbers (version 2): a(n) = (n+1)³ + (n+1)*∑_i=0..n i. A50509

Number of n X n circulant invertible (0,1) matrices over the reals. A86323

a(n) = (3·8ⁿ-4ⁿ)/2. A165148

a(n) = 2^floor(n/2)+2^floor(n/2-1)-2^floor((n-1/3)). A170831

Numbers k such that k + A224787(k) is a square. A386640

a(n) = ∑_{k=0..floor(n/2)} binomial(k+1,4·n-8·k+1). A390221

a(1) = 4; a(n) = smallest composite number greater than the sum of all previous terms. A70232

Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250724