4

Summary

4 is a positive integer^[1]. 4 ranks in the top 0.28% of positive_integer entities by monthly Wikipedia readership (2,608 views/month, #2 of 724).^[2]

Key Facts

• 4's image is recorded as Plate, Brindley Close footbridge.jpg^[3].
• 4's image is recorded as Maya 4.svg^[4].
• 4's instance of is recorded as positive integer^[5].
• 4's instance of is recorded as composite number^[6].
• 4's instance of is recorded as deficient number^[7].
• 4's instance of is recorded as square number^[8].
• 4's instance of is recorded as even number^[9].
• 4's instance of is recorded as centered triangular number^[10].
• 4's instance of is recorded as tetrahedral number^[11].
• 4's instance of is recorded as power of two^[12].
• 4's instance of is recorded as strictly non-palindromic number^[13].
• 4's instance of is recorded as harshad number^[14].
• 4's instance of is recorded as semiprime^[15].
• 4's instance of is recorded as trimorphic number^[16].
• 4's instance of is recorded as Motzkin number^[17].
• 4's audio is recorded as 4 number morse code.ogg^[18].
• 4's follows is recorded as 3^[19].
• 4's followed by is recorded as 5^[20].
• 4's GND ID is recorded as 4284786-2^[21].
• 4's Library of Congress authority ID is recorded as sh85051074^[22].
• 4's Commons category is recorded as 4 (number)^[23].
• 4's pronunciation audio is recorded as Lb-véier.ogg^[24].
• 4's opposite of is recorded as −4^[25].
• 4's opposite of is recorded as ¼^[26].
• 4's Unicode character is recorded as 4^[27].

Body

Works and Contributions

Things named for 4 include Blue Ivy Carter^[28], a singer^[29], b. 2012^[30], of United States^[31]; Quaternary^[32], a system^[33]; Wednesday^[34], a day of the week^[35]; Thursday^[36], a day of the week^[37]; Four Knights Game^[38], a chess opening^[39]; FOUR^[40], a building complex^[41], in Germany^[42], founded in 2024^[43]; and Tylonycteris bat coronavirus HKU4^[44], a taxon^[45].

Why It Matters

4 ranks in the top 0.28% of positive_integer entities by monthly Wikipedia readership (2,608 views/month, #2 of 724).^[2] 4 has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.^[46] 4 is known by 49 alternative names across languages and contexts.^[47]

Entities named for 4 include Blue Ivy Carter^[28], a singer^[29], b. 2012^[30], of United States^[31]; Quaternary^[32], a system^[33]; Wednesday^[34], a day of the week^[35]; Thursday^[36], a day of the week^[37]; Four Knights Game^[38], a chess opening^[39]; and FOUR^[40], a building complex^[41], in Germany^[42], founded in 2024^[43].