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Properties of the Number 30580

Thirty Thousand Five Hundred Eighty

Basics

Value: 30579 → 30580 → 30581

Parity: even

Prime: No

Previous Prime: 30577

Next Prime: 30593

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 2 × 5 × 11 × 139

Divisors: 1, 2, 4, 5, 10, 11, 20, 22, 44, 55

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 111011101110100

Octal: 73564

Duodecimal: 15844

Hexadecimal: 7774

Square: 935136400

Square Root: 174.87138130637615

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

Larger of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = ψ(n) - n and ψ(n) = A001615(n) is the Dedekind ψ function. A323330
Sorted positions of first appearances in A368109 (number of ways to choose a binary index of each binary index). A368112
a(n) = ∑k=0..n binomial(k+3,3) * binomial(k,n-k)2. A377148
Lower triangular array called S2hat(-5) related to partition number array A144341. A144342
Denominators of continued fraction convergents to sqrt(998). A42933
a(n) = 4·floor(28·2n/15). A102650
Numbers m such that there exists a j for which m = ∑k=1..j (m mod k), where k runs through the largest j primes less than m. A274422
Number of ways to label the vertices of the octahedron (or faces of the cube) with nonnegative integers summing to n, where labelings that differ only by rotation or reflection are considered the same. A97513
a(1)=1; for n>1, a(n) = least integer greater than a(n-1) such that the sums of the divisors of the pairwise sums of a(1),...,a(n) are all distinct. A293542
Number of nondecreasing -n..n vectors of length 3 whose dot product with some nondecreasing -n..n vector equals 3. A226411