440 (number)

← 439 440 441 →
List of numbers; Integers; ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	four hundred forty
Ordinal	440th; (four hundred fortieth)
Factorization	23 × 5 × 11
Divisors	1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440
Greek numeral	ΥΜ´
Roman numeral	CDXL
Binary	1101110002
Ternary	1210223
Senary	20126
Octal	6708
Duodecimal	30812
Hexadecimal	1B816
Hebrew	מת (Tav)(Mem)

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440 (four hundred [and] forty) is the natural number following 439 and preceding 441.

In mathematics

440 has the factorization $23 \cdot 5 \cdot 11.$

440 is:

Even
The sum of the first 17 prime numbers
A harshad number
An abundant number^[1]
A happy number^[2]

In science

A440 (pitch standard) widely used for the musical note A4, the A above Middle C, often used for tuning instruments

References

^ "Facts about the number 440". Numbermatics - the number explorer. Retrieved 21 March 2017.
^ Guy, Richard (9 March 2013). Unsolved Problems in Number Theory. Springer Science & Business Media. p. 358. ISBN 9780387266770.

[1] "Facts about the number 440". Numbermatics - the number explorer. Retrieved 21 March 2017.

[2] Guy, Richard (9 March 2013). Unsolved Problems in Number Theory. Springer Science & Business Media. p. 358. ISBN 9780387266770.

[1]