Properties of the Number 28072

Twenty-Eight Thousand Seventy-Two

Basics

Value: 28071 → 28072 → 28073

Parity: even

Prime: No

Previous Prime: 28069

Next Prime: 28081

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 11 ² × 29

Divisors: 1, 2, 4, 8, 11, 22, 29, 44, 58, 88

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110110101000

Octal: 66650

Duodecimal: 142B4

Hexadecimal: 6da8

Square: 788037184

Square Root: 167.547008329006

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

a(n+3) = 2a(n+2) - 3a(n+1) + 2a(n); a(0) = 1, a(1) = 1, a(2) = 0. A105578

Solve 2ⁿ - 2 = 7(x² - x) + (y² - y) for (x,y) with x>0, y>0; sequence gives value of x. A76632

Number of binary words whose (unique) decreasing Lyndon decomposition is into Lyndon words each with an even number of 1's; EULER transform of A051841. A123915

Numbers k that divide the (right) concatenation of all numbers <= k written in base 23 (most significant digit on left). A29468

a(n) = 90·binomial(n,6) + 90·binomial(n,5) + 54·binomial(n,4) + 24·binomial(n,3) + 9·binomial(n,2) + 3·n + 1. A382640

Segment the list of prime numbers into sublists L₁, L₂, ... with L₁ = {2} and L_n = {p₁, p₂, ..., p_a(n)}, where a(n) is the largest m such that for 0 < i < m, p₁ - prevprime(p₁) > p₂ - p₁ >= p_i+1 - p_i. A348168

Triangle T, read by rows, where column k of T = column 0 of T^k+1 for k>0, with column 0 of T = column 0 of T⁴ shift right. A138271

Expansion of 1/((1-3x)(1-5x)(1-10x)(1-12x)). A28072