Properties of the Number 28019

Twenty-Eight Thousand Nineteen

Basics

Value: 28018 → 28019 → 28020

Parity: odd

Prime: Yes

Previous Prime: 28001

Next Prime: 28027

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 28019

Divisors: 1, 28019

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110101110011

Octal: 66563

Duodecimal: 1426B

Hexadecimal: 6d73

Square: 785064361

Square Root: 167.38876903783

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

Primes p2 such that p1³ + p2² is an average of twin primes and p1 < p2 are consecutive primes. A138755

Number of times prime(n) occurs as the least prime factor among numbers 1 .. prime(n)⁴: a(n) = A078898(A030514(n)). A250478

Primes whose digits can be arranged in increasing cyclic order - to form a substring of 123456789012345678901234567890... A68710

Number of essentially series nonequivalent series-parallel networks with n elements and without unit elements in parallel. A339151

Records in A030000. A372044

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

Cyclops Sophie-Germain primes. A183058

Primes p such that 16·p² + 10·p + 1 divides 2^p - 1. A231916

Primes p of the form a²-b² and p·a-b is also prime (with b=prime and a=b+1). A173875

Cyclops primes p such that 2p+1 is also a Cyclops prime. A183059