Properties of the Number 81028

Eighty-One Thousand Twenty-Eight

Basics

Value: 81027 → 81028 → 81029

Parity: even

Prime: No

Previous Prime: 81023

Next Prime: 81031

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 47 × 431

Divisors: 1, 2, 4, 47, 94, 188, 431, 862, 1724, 20257

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110010000100

Octal: 236204

Duodecimal: 3AA84

Hexadecimal: 13c84

Square: 6565536784

Square Root: 284.65417615064075

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

Numbers k such that σ(k) = ψ(k) + τ(k)⁴. A389546

Convolution of A010060 and A000244. A101555

Indices of primes in sequence defined by A(0) = 23, A(n) = 10·A(n-1) + 33 for n > 0. A101964

Number of bipartite partitions. A2765

Number of positions that are exactly n moves from the starting position in the Skewb puzzle. A79745

Numbers k such that k-th term of A080997 is prime. A81028