Properties of the Number 87448

Eighty-Seven Thousand Four Hundred Forty-Eight

Basics

Value: 87447 → 87448 → 87449

Parity: even

Prime: No

Previous Prime: 87443

Next Prime: 87473

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 ³ × 17 × 643

Divisors: 1, 2, 4, 8, 17, 34, 68, 136, 643, 1286

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10101010110011000

Octal: 252630

Duodecimal: 42734

Hexadecimal: 15598

Square: 7647152704

Square Root: 295.7160800497667

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

T(n,k) = number of (n+1) X (k+1) 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases. A206021

Number of Fermat pseudoprimes to base 7 less than 10ⁿ. A114249

a(0)=1, a(n) = least k > a(n-1) such that k·a(n-1) is a triangular number. A213005

a(1) = a(2) = 1, a(n) = a(n-1) + A007947(a(n-2)) for n >= 3, i.e., a(n) = a(n-1) plus the largest squarefree divisor of a(n-2). A121367

G.f. satisfies: A(x) = A(x²)² + x·A(x²)⁴. A174513

First row of spectral array W(γ²+1). A250254

Numbers k such that 3·10^k + 5·R_k - 4 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A102971

Number of (n+1) X 3 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases. A206015

Number of (n+1) X 4 0..3 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases. A206016

Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7. A252400