Properties of the Number 57440

Fifty-Seven Thousand Four Hundred Forty

Basics

Value: 57439 → 57440 → 57441

Parity: even

Prime: No

Previous Prime: 57427

Next Prime: 57457

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁵ × 5 × 359

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1110000001100000

Octal: 160140

Duodecimal: 292A8

Hexadecimal: e060

Square: 3299353600

Square Root: 239.66643486312387

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

T(n,k) = number of defective 4-colorings of an n X k 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order. A229755

Sum of terms in n-th row of A077316. A77318

a(n) = ∑_{1 <= x, y <= n} lcm(x, y). A64951

a(n) = 36·n² - 4·n (n>=1). A304380

Numbers k such that 183·2^k+1 is prime. A32468

a(n) = (5/6)*n³+(5/2)*n²+(8/3)*n. A92185

Number of defective 4-colorings of an n X 2 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order. A229749

Number of (6+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically. A258559

Numbers that contain their base-16 representation in their decimal representation. A227549

Numbers n such that n·M127 + 1 is prime, where M127 = 2¹²⁷ - 1. A57440