Properties of the Number 57128

Fifty-Seven Thousand One Hundred Twenty-Eight

Basics

Value: 57127 → 57128 → 57129

Parity: even

Prime: No

Previous Prime: 57119

Next Prime: 57131

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 37 × 193

Divisors: 1, 2, 4, 8, 37, 74, 148, 193, 296, 386

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1101111100101000

Octal: 157450

Duodecimal: 29088

Hexadecimal: df28

Square: 3263608384

Square Root: 239.01464390283704

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 n such that the last 9 decimal digits of the n-th Fibonacci number is pandigital 1-9. A112371

Minimum sum of n distinct positive numbers, any n-1 of which sum to a square. A35305

Number of binary strings of length n with no substrings equal to 0001 0101 or 1100. A164474

Appearance radii of visible vectors in the medial axis test mask for the Euclidean distance in Z². A171988

Number of (n+1) X (n+1) -4..4 symmetric matrices with every 2 X 2 subblock having sum zero and three or four distinct values. A211495

Smallest k > n such that there are exactly n pairs (x,y) (1 <= x <= y <= k) solutions of the equation: φ(xy)=σ(x)+σ(y). A71780

Numbers n such that -3 is a square mod n. A57128

Triangle read by rows: T(n, k) = binomial(n, k) + 2*(1 + n! - k! - (n-k)!). A156049