28 is approximately the number of Earth years that make one Saturn year.
28 is a happy number, a triangular number, a hexagonal number, a centred nonagonal number, a harmonic divisor number, the fourth magic number and the second perfect number. It can be partitioned 3718 ways.
The Sombrero galaxy is roughly 28 million light years away from us. Zeta Tucanae is an F-class star roughly 28 light years away.
The object M28 is a globular cluster in the constellation Sagittarius. The object NGC 28 is an elliptical galaxy in the constellation Phoenix.
There are 28 convex uniform honeycombs.
Zeta Orionis A is a hot, luminous star with 28 solar masses. Epsilon Indi Bb is a cool brown dwarf with 28 Jupiter masses.
28 is the atomic mass of silicon, the atomic number of nickel and the molecular mass of ethene and dinitrogen.
28 can be written 00011100 in binary, FS in ASCII, 1C in hexadecimal or XXVIII in roman numerals. The latin prefix octoviginti refers to 28.
There are approximately 28 grams in an ounce.
28°C is the melting point of diethanolamine, methyl phenol, nitrofuran, octadecane and methyl toluene sulfonate. It’s also the approximate melting point of butter.
28 BC was the earliest historic record of a sunspot, made by chinese astronomers.
On December 28th in 1612, Gallileo was the first astronomer to observe planet Neptune, which he mistook for a “fixed” star.
In southwest Australia, the “twenty eight parrot” (barnardius zonarius semitorquatus) has a call consisting of three syllables, which sound like it’s crying out “28”.
I’m 28 today. I share my birthday with Marvel Comics legend, Stan Lee.
Aged 28 in 1592, William Shakespeare wrote The Comedy of Errors and in 1887 Arthur Conan Doyle wrote “A Study in Scarlet”, the first Sherlock Holmes story.
Aged 28 in 1850 Rudolf Clausius discovered the second law of thermodynamics and invented the concept he would later call “entropy” and in 1772 Antoine Lavoisier deposited a sealed note with his theory of combustion, concerning a gas which he would later name “oxygen”.