Properties of the Number 28768

Twenty-Eight Thousand Seven Hundred Sixty-Eight

Basics

Value: 28767 → 28768 → 28769

Parity: even

Prime: No

Previous Prime: 28759

Next Prime: 28771

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 ⁵ × 29 × 31

Divisors: 1, 2, 4, 8, 16, 29, 31, 32, 58, 62

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000001100000

Octal: 70140

Duodecimal: 14794

Hexadecimal: 7060

Square: 827597824

Square Root: 169.6113203769135

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

Nonunitary weird numbers: numbers that are nonunitary abundant but not nonunitary pseudoperfect. A327948

Triangle read by rows: coefficients d(n,k) of André polynomials D(x,n) = ∑_k>0 d(n,k)*x^k. A94503

Number of partitions of [n] such that the element sum of each block is odd. A369079

a(n) = 8·a(n-1) - 2·a(n-2), with a(0)=0, a(1)=1. A190975

a(n) = floor(n*(n-1)*(n-2)*(n-3)/30). A11940

Inverse Moebius transform of Fibonacci numbers 0, 1, 1, 2, 3, 5, 8, ... A108046

Denominator of sum of reciprocals of first n 5-simplex numbers A000389. A118432

Practical numbers q with q + 2 and q² + 2 both practical. A294225

a(1)=1; for n>1, a(n) = a(n-1) / k if there exists an unused positive integer k (choose the smallest) such that a(n) is a distinct positive integer; otherwise a(n) = a(n-1) * k if the same conditions apply. A371359

Open 3-dimensional ball numbers (version 4): a(n) is the number of integer points (i,j,k) contained in an open ball of diameter n, centered at (1/2, 1/2, 1/2). A53596