Properties of the Number 78328

Seventy-Eight Thousand Three Hundred Twenty-Eight

Basics

Value: 78327 → 78328 → 78329

Parity: even

Prime: No

Previous Prime: 78317

Next Prime: 78341

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 9791

Divisors: 1, 2, 4, 8, 9791, 19582, 39164, 78328

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10011000111111000

Octal: 230770

Duodecimal: 393B4

Hexadecimal: 131f8

Square: 6135275584

Square Root: 279.87139903891574

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

Number of compositions of n such that the number of parts and the greatest part are coprime. A199886

Expansion of g.f. x*(1 +30·x +49·x² -71·x³ -116·x⁴)/((1+2·x)*(1-2·x²) *(1-2·x-4·x²)). A121960

Consider a decimal number of k>=2 digits z = d_k*10^k-1 + d_k-1*10^k-2 + ... + d₂*10 + d₁ and the sum y = ∑_x=2..k {∑_j=1..k-x{d_j+x-1*10^j-1} - ∑_j=1..x-1{d_j*10^j-1}}. Sequence lists the numbers for which y = τ(z), where τ(z) is the number of divisors of z. A248904

Least m such that A078142(m) = A006530(m) = n-th prime. A78328