ℕ atory
Play Now

Properties of the Number 30028

Thirty Thousand Twenty-Eight

Basics

Value: 30027 → 30028 → 30029

Parity: even

Prime: No

Previous Prime: 30013

Next Prime: 30029

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 2 × 7507

Divisors: 1, 2, 4, 7507, 15014, 30028

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111010101001100

Octal: 72514

Duodecimal: 15464

Hexadecimal: 754c

Square: 901680784

Square Root: 173.28589094326173

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

Numbers k such that A003415(k) == A276085(k) (mod 2310), where A003415 is the arithmetic derivative and A276085 is the primorial base log-function. A391864
Number of partitions p of n such that (sum of parts with multiplicity 1) > (sum of all other parts). A240451
Number of partitions p of n such that (sum of parts with multiplicity 1) >= (sum of all other parts). A240452
Lexicographically earliest sequence of distinct positive integers with no finite subset summing to a primorial number (A002110). A353980
The least integer k >= 0 for which A328578(k) = A257993(A276086(A276086(k))) = n. A328761
a(n) = A108951(n) - A373158(n), where A108951 is fully multiplicative and A373158 is fully additive with a(p) = p# for prime p, where x# is the primorial A034386(x). A373984
G.f.: ∑n>=1 ∑k=0..n binomial(n,k) * xk2 * (xn - xk)n-k, ignoring the constant term. A292808
a(n) = φ(prime(n)#-1) where φ is the Euler totient function and p# is the product of all the primes from 2 to p inclusive. A366810
θ series of hypothetical extremal 12-dimensional strongly 21-modular lattice. A30028