Properties of the Number 47990

Forty-Seven Thousand Nine Hundred Ninety

Basics

Value: 47989 → 47990 → 47991

Parity: even

Prime: No

Previous Prime: 47981

Next Prime: 48017

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 4799

Divisors: 1, 2, 5, 10, 4799, 9598, 23995, 47990

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1011101101110110

Octal: 135566

Duodecimal: 23932

Hexadecimal: bb76

Square: 2303040100

Square Root: 219.0662000400792

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) = n³ - 2·n² + 2·n + 1. A188947

Number of unrooted n-edge isthmusless maps in the plane (planar with a distinguished outside face). A103942

Number of nX3 -1,1 arrays such that the sum over i=1..n,j=1..3 of i·x(i,j) is zero, the sum of x(i,j) is zero, and rows are nondecreasing (number of ways to distribute 3-across galley oarsmen left-right at n fore-aft positions so that there are no turning moments on the ship). A225339

Number of 12Xn -1,1 arrays such that the sum over i=1..12,j=1..n of i·x(i,j) is zero, the sum of x(i,j) is zero, and rows are nondecreasing (number of ways to distribute n-across galley oarsmen left-right at 12 fore-aft positions so that there are no turning moments on the ship). A225352

Numbers whose base-6 representation has exactly 7 runs. A43615

a(n) = floor(e*(n+3)!) - (n+3)*(n+2)*(n+1)*n·floor(e*(n-1)!). A80770

a(n+1) = a(n) + (n² + 1)*a(n-1). A47990