Properties of the Number 784

Seven Hundred Eighty-Four

Basics

Value: 783 → 784 → 785

Parity: even

Prime: No

Previous Prime: 773

Next Prime: 787

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ⁴ × 7 ²

Divisors: 1, 2, 4, 7, 8, 14, 16, 28, 49, 56

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1100010000

Octal: 1420

Duodecimal: 554

Hexadecimal: 310

Square: 614656

Square Root: 28

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

The squares: a(n) = n². A290

Perfect powers: m^k where m > 0 and k >= 2. A1597

Powerful numbers, definition (1): if a prime p divides n then p² must also divide n (also called squareful, square full, square-full or 2-powerful numbers). A1694

Quarter-squares: a(n) = floor(n/2)*ceiling(n/2). Equivalently, a(n) = floor(n²/4). A2620

Sum of first n cubes; or n-th triangular number squared. A537

Squares and twice squares. A28982

Powerful numbers (A001694) that are not prime powers (A000961). A286708

Even squares: a(n) = (2·n)². A16742

Number of stacks, or planar partitions of n; also number of weakly unimodal compositions of n. A1523

Number of complete partitions of n. A126796