Properties of the Number 78320

Seventy-Eight Thousand Three Hundred Twenty

Basics

Value: 78319 → 78320 → 78321

Parity: even

Prime: No

Previous Prime: 78317

Next Prime: 78341

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁴ × 5 × 11 × 89

Divisors: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011000111110000

Octal: 230760

Duodecimal: 393A8

Hexadecimal: 131f0

Square: 6134022400

Square Root: 279.8571063953889

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 ways to place 2 nonattacking knights on an n X n cylindrical board. A172964

Triangle, read by rows, where the g.f. of column k, C_k(x), is equal to the product: C_k(x) = ∏_k=0..n 1/(1 - binomial(n,k)*x). A124834

Primitive terms of A259850. A361363

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

Sum of all prime factors of n·rad(n)+1, where rad = A007947 (squarefree kernel). A78320