Properties of the Number 28409

Twenty-Eight Thousand Four Hundred Nine

Basics

Value: 28408 → 28409 → 28410

Parity: odd

Prime: Yes

Previous Prime: 28403

Next Prime: 28411

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 28409

Divisors: 1, 28409

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111011111001

Octal: 67371

Duodecimal: 14535

Hexadecimal: 6ef9

Square: 807071281

Square Root: 168.5496959356498

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 that divide the sum of digits of 13^k. A175525

Beginnings of maximal chains of primes with four members (three links). A152867

Number of compositions (ordered partitions) of n into distinct parts >= 6. A339104

Primes p such that the largest prime factor of p⁵ + 1 is less than p. A102327

Primes of the form 9·k⁴ - 204·k³ + 1777·k² - 7038·k + 10729, for k >= 0, listed by increasing k. A117090

Greater of two consecutive primes, p < q, such that both p·q+p-q and p·q-p+q are prime numbers. A154552

Primes p such that p+2 and q are primes, where q is concatenation of binary representations of p and p+2: q = p·2^L + p+2, where L is the length of binary representation of p+2: L=A070939(p+2). A232238

Primes p such that 2·p+q and 2·p+r are prime, where q and r are the next two primes after p. A340225

Primes of the form 10n²+6n+1. A154409

Primes p such that q=p²+p+1 is prime and (q²+q+1)/3 is prime. A322748