Properties of the Number 84280

Eighty-Four Thousand Two Hundred Eighty

Basics

Value: 84279 → 84280 → 84281

Parity: even

Prime: No

Previous Prime: 84263

Next Prime: 84299

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ³ × 5 × 7 ² × 43

Divisors: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10100100100111000

Octal: 244470

Duodecimal: 40934

Hexadecimal: 14938

Square: 7103118400

Square Root: 290.3101789465881

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 2^k + 31 is prime. A247952

The number of regions inside a decagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. A333139

a(n) = (n+1)²*(n+2)*(n+3)*(3·n+4)/24. A108650

Brent's irregular triangle T[r,k] related to Hardy-Littlewood constants of prime gaps 2r. A381083

Number of distinct proper angles that can be formed by a vertex and two leg endpoints on grid points in an n X n square grid. A252591

Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks and between consecutive elements within the blocks are not larger than six. A287585

Number of (n+6)X13 0..1 matrices with each 7X7 subblock idempotent. A224587

Sum of all parts of all partitions of n that contain 1 as a part. A228816

Numbers m such that the denominator of m/ρ(m) is 3, where ρ is A206369; i.e. A294649(m) = 3. A297358

Number of labeled 4-colorable (i.e., chromatic number <= 4) graphs on n nodes. A84280