Numbers Over 2020: Properties and Meanings

Number 4900

The only numbers which are simultaneously square and square pyramidal are 1 and 4900.

Number 5400

In Laws, Plato suggests that 5040 is the optimal number of citizens in a state because:
1. It is the product of 12, 20, and 21.
2. The 12th part of it can still be divided by 12.
3. It has 59 proper divisors, including all numbers for 1 to 12 except 11, and 5038--which is very close to 5040--is divisible by 11

1 x2 x 3 x 4 x 5 x 6 x 7 = 5040

7 x8 x 9 x 10 = 5040

Number 84000

The illnesses of the mind arise from the three poisons of greed, anger and stupidity and are of eighty-four thousand kinds.

Number 432000

Some cultures measure time in terms of very long cycles. In the Hindu tradition the present cycle of time consists of 432000 years. This is called the "Kali Yuga". The great cycle in which the Kali Yuga falls consists of 4,320,000 years.

According to the Satapatha Brahmana, the number of syllables in the Rigveda is 432,000, equalling the number of muhurtas (1 day = 30 muhurtas) inforty years.

The Icelandic tradition tells of the great warrior hall in which there were 540 doors. Through each door there would come 800 divine warriors: 800 x 540 = 432000 warriors.

Number 12960000

The positive integers 216 and 12960000 appear in an obscure passage in Plato's The Republic. In this passage, Plato alludes to the fact that 216 is equal to 6 cubed, where 6 is one of the numbers representing marriage since it is the product to the female 2 and the male 3. Plato was also aware of the fact the sum of the cubes of the 3-4-5 Pythagorean triple is equal to 216).

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