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Properties of the Number 28309

Twenty-Eight Thousand Three Hundred Nine

Basics

Value: 28308 → 28309 → 28310

Parity: odd

Prime: Yes

Previous Prime: 28307

Next Prime: 28319

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 28309

Divisors: 1, 28309

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111010010101

Octal: 67225

Duodecimal: 14471

Hexadecimal: 6e95

Square: 801399481

Square Root: 168.25278600962304

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

Noncomposite numbers in the western ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American. A168025
Primes p such that, if q is the next prime, p + q2 is a prime times a power of 10. A352837
Nonnegative integers k such that the Euclidean distance between the vector of proportions of the digits 0-9 in 2k and the uniform distribution (1/10, ..., 1/10) sets a new minimum. A393331
Nonnegative integers k such that the Manhattan distance between the vector of proportions of the digits 0-9 in 2k and the uniform distribution (1/10, ..., 1/10) sets a new minimum. A393332
Denominator of the mean of all parts of all partitions of n. A236361
Numbers k such that the continued fraction for sqrt(k) has period 97. A20436
T(n,n-4), array T as in A038792. A38794
Expansion of (1-x)/(1-2·x+x2+2·x3). A78002
Primes p such that p=prime(k), prime(k+1), and prime(k+2) end in the same digit. A328452
a(n) = sum of the first n primes whose distance to next prime is 4. A360226