Properties of the Number 756

Seven Hundred Fifty-Six

Basics

Value: 755 → 756 → 757

Parity: even

Prime: No

Previous Prime: 751

Next Prime: 757

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ³ × 7

Divisors: 1, 2, 3, 4, 6, 7, 9, 12, 14, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1011110100

Octal: 1364

Duodecimal: 530

Hexadecimal: 2f4

Square: 571536

Square Root: 27.49545416973504

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

Oblong (or promic, pronic, or heteromecic) numbers: a(n) = n*(n+1). A2378

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

Constant term of the reduction of n-th Fibonacci polynomial by x² -> x+1. (See Comments.) A192232

Number of partitions of n in which the number of parts divides n. A67538

Numbers that are the sum of 2 positive cubes. A3325

a(n) = 2·n*(2·n-1). A2939

Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=1, r=5, I={0,2,3}. A79955

Sum of cubes of the digits of n written in base 10. A55012

Numbers that are divisible by exactly 6 primes with multiplicity. A46306

T(n,k) = binomial(n,k)*binomial(n+k,k), 0 <= k <= n, triangle read by rows. A63007