Properties of the Number 28158

Twenty-Eight Thousand One Hundred Fifty-Eight

Basics

Value: 28157 → 28158 → 28159

Parity: even

Prime: No

Previous Prime: 28151

Next Prime: 28163

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 13 × 19 ²

Divisors: 1, 2, 3, 6, 13, 19, 26, 38, 39, 57

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110111111110

Octal: 66776

Duodecimal: 14366

Hexadecimal: 6dfe

Square: 792872964

Square Root: 167.80345646022909

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

Pentagonal pyramidal numbers: a(n) = n²*(n+1)/2. A2411

a(0)=0, a(1)=1, a(2)=1, a(3)=1, a(n) = a(n-3) + a(n-4) for n > 3. A79398

Even pentagonal pyramidal numbers. A15224

a(n) = n*(2*(n - 2)*n + (-1)ⁿ + 3)/4. A323724

Expansion of ∏_m>=1 (1+q^m)^-13. A22608

Number of compositions of n with exactly one descent. A241626

Transform of A059502 applied to sequence 4,5,6,... A59507

a(n) = 4n³ + 2n². A89207

Pentagonal pyramidal numbers divisible by 3. A299412

a(n) = ∑_k=m..n T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027935. A27947