Properties of the Number 80728

Eighty Thousand Seven Hundred Twenty-Eight

Basics

Value: 80727 → 80728 → 80729

Parity: even

Prime: No

Previous Prime: 80713

Next Prime: 80737

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 10091

Divisors: 1, 2, 4, 8, 10091, 20182, 40364, 80728

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10011101101011000

Octal: 235530

Duodecimal: 3A874

Hexadecimal: 13b58

Square: 6517009984

Square Root: 284.1267322868441

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 n X 5 1..2 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order. A166808

Self-convolution of array T given by A026681. A26986

a(0) = 3; for n>0, a(n) is taken to be the smallest positive integer greater than a(n-1) which is consistent with the condition "n is a member of the sequence if and only if a(n) == 2 mod 3". A80728