Properties of the Number 38889

Thirty-Eight Thousand Eight Hundred Eighty-Nine

Basics

Value: 38888 → 38889 → 38890

Parity: odd

Prime: No

Previous Prime: 38873

Next Prime: 38891

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 29 × 149

Divisors: 1, 3, 9, 29, 87, 149, 261, 447, 1341, 4321

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1001011111101001

Octal: 113751

Duodecimal: 1A609

Hexadecimal: 97e9

Square: 1512354321

Square Root: 197.20294115453754

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 gcd(k, n)³. A343497

Number of zeros in numbers 1 to 999..9 (n digits). A33713

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0. A255792

Maximum number of points visible from some point in a cubic n·n x n lattice. A141227

Numbers that set a new integer record for the ratio between the product and the sum of their digits. A240520

Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0. A255788

Number of (n+2)X(6+2) 0..1 arrays with no 3x3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0. A255790

Triangle read by rows, T(n,k) = binomial(n, k)*hypergeom2F1(k - n, n + 1, k + 2, -2) for n >= 0 and 0 <= k <= n. A297704

Primes p such that 17 is a square mod p. A38889

Indices of primes in sequence defined by A(0) = 39, A(n) = 10·A(n-1) - 1 for n > 0. A101847