Properties of the Number 30956

Thirty Thousand Nine Hundred Fifty-Six

Basics

Value: 30955 → 30956 → 30957

Parity: even

Prime: No

Previous Prime: 30949

Next Prime: 30971

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 71 × 109

Divisors: 1, 2, 4, 71, 109, 142, 218, 284, 436, 7739

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111100011101100

Octal: 74354

Duodecimal: 15AB8

Hexadecimal: 78ec

Square: 958273936

Square Root: 175.9431726438966

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

a(n) = ∑_k=0..n T(k)*T(n-k), where T is A000073; convolution of A000073 with itself. A73778

T(n,k)=Number of nXk 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z. A210788

Real part of absolute Gaussian perfect numbers, in order of increasing magnitude. A102531

Number of rooted trees with a forbidden limb of length 5. A52328

Numbers n = p·q, where n, p, and q together contain all 10 digits at least once. A253172

Number of partitions of floor(7n/2)-1 into n nonnegative integers each no greater than 7. A1980

Number of (n+2) X 4 binary arrays avoiding patterns 001 and 110 in rows, columns and nw-to-se diagonals. A202441

Number of n X 1 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z. A210781

Number of n X 5 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically. A206868

[ exp(2/9)*n! ]. A30956