Properties of the Number 30720

Thirty Thousand Seven Hundred Twenty

Basics

Value: 30719 → 30720 → 30721

Parity: even

Prime: No

Previous Prime: 30713

Next Prime: 30727

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ¹¹ × 3 × 5

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 111100000000000

Octal: 74000

Duodecimal: 15940

Hexadecimal: 7800

Square: 943718400

Square Root: 175.27121840165316

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

13-almost primes (generalization of semiprimes). A69274

a(n) = 15·2ⁿ. A110286

a(n) is the n-th quartic factorial number divided by 4. A34177

Number T(n,k) of compositions of n where each part i is marked with a word of length i over a k-ary alphabet whose letters appear in alphabetical order and all k letters occur at least once in the composition; triangle T(n,k), n >= 0, 0 <= k <= n, read by rows. A261781

a(n) = A257851(n,n). A264959

a(0) = a(1) = 1; for n > 1, a(n) = (n+2)*2^n-2. A87447

Numbers n that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=12. A135197

Numbers k such that (number of prime factors of k counted with multiplicity) less (number of distinct prime factors of k) = 10. A195069

Denominators of coefficients of expansion of Bessel function J₃(x). A14401

First differences of even superperfect numbers A061652, divided by 2. A139235