Weird number
In
mathematics, a
weird number is a
natural number that is
abundant but not
semiperfect. The first few weird numbers are 70, 836, 4030, 5830, 7192, 7912, 9272, 10430, ... (
Sloane's
A006037); it has been shown that an infinite number of weird numbers exist, and the sequence of weird numbers has also been proven to have positive
Schnirelmann density.
As of today, no odd weird number has been found.
Also see
External links