Properties of the Number 80780

Eighty Thousand Seven Hundred Eighty

Basics

Value: 80779 → 80780 → 80781

Parity: even

Prime: No

Previous Prime: 80779

Next Prime: 80783

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 7 × 577

Divisors: 1, 2, 4, 5, 7, 10, 14, 20, 28, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10011101110001100

Octal: 235614

Duodecimal: 3A8B8

Hexadecimal: 13b8c

Square: 6525408400

Square Root: 284.2182260165593

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 that are the sum of 8 positive 9th powers. A3397

T(n,k)=Number of lower triangles of an n X n 0..k array with new values introduced in row major order 0..k and no element equal to more than two horizontal or vertical neighbors. A194576

G.f. A(x) satisfies A(x) = 1 + x⁴ * (A(x) / (1 - x))². A361229

Pell numbers A000129 with 0 instead of last digit. A131726

Number of lower triangles of an n X n 0..4 array with new values introduced in row major order 0..4 and no element equal to more than two horizontal or vertical neighbors. A194572

a(1)=2; for n > 1, a(n) is the smallest integer greater than a(n-1) consistent with the condition "n is in the sequence if and only if a(n) is congruent to 0 (mod 6)". A80780