46 (number)

46 (forty-six) is the natural number following 45 and preceding 47.
In mathematics
Forty-six is a Wedderburn-Etherington number, an enneagonal number and a centered triangular number. It is the sum of the totient function for the first twelve integers. 46 is the largest even integer that can't be expressed as a sum of two abundant numbers.
46 is the 16th semiprime. 46 is the third semiprime with a semiprime aliquot sum. The aliquot sequence of 46 is (46,26,16,15,9,4,3,1,0).
Since it is possible to find sequences of 46 consecutive integers such that each inner member shares a factor with either the first or the last member, 46 is an Erdős–Woods number.
In science

The atomic number of palladium.
The number of human chromosomes.
The (decimal) value of the ASCII code for the period (full stop).
The approximate molar mass of ethanol (46.07 g mol−1)

Astronomy...