Number

270

270 is a composite number, even, a calendar year.

Abundant Number Arithmetic Number Evil Number Harshad / Niven Practical Number Recamán's Sequence Semiperfect Number Year

Historical context — 270 AD

Calendar year

Year 270 (CCLXX) was a common year starting on Saturday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Historical context — 270 BC

Calendar year

Year 270 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Year facts

Year type: Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
Days in year: 365
ISO weeks: 52
Started on: Saturday
January 1, 270
Ended on: Saturday
December 31, 270
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 270s
270–279
Century: 3rd century
201–300
Millennium: 1st millennium
1–1000
Years ago: 1,756
1756 years before 2026.

In other calendars

Hebrew: 4030 / 4031 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Tiger
Sexagenary cycle position 27 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 813 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 262 / 263 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 192 / 191 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 9
Digit product: 0
Digital root: 9
Palindrome: No
Bit width: 9 bits
Reversed: 72
Recamán's sequence: a(139) = 270
Square (n²): 72,900
Cube (n³): 19,683,000
Divisor count: 16
σ(n) — sum of divisors: 720
φ(n) — Euler's totient: 72
Sum of prime factors: 16

Primality

Prime factorization: 2 × 3 ³ × 5

Nearest primes: 269 (−1) · 271 (+1)

Divisors & multiples

All divisors (16)

1 · 2 · 3 · 5 · 6 · 9 · 10 · 15 · 18 · 27 · 30 · 45 · 54 · 90 · 135 (half) · 270

Aliquot sum (sum of proper divisors): 450

Factor pairs (a × b = 270)

1 × 270

2 × 135

3 × 90

5 × 54

6 × 45

9 × 30

10 × 27

15 × 18

First multiples

270 · 540 (double) · 810 · 1,080 · 1,350 · 1,620 · 1,890 · 2,160 · 2,430 · 2,700

Sums & aliquot sequence

As consecutive integers: 89 + 90 + 91 66 + 67 + 68 + 69 52 + 53 + 54 + 55 + 56 26 + 27 + … + 34

Aliquot sequence: 270 → 450 → 759 → 393 → 135 → 105 → 87 → 33 → 15 → 9 → 4 → 3 → 1 → 0 — terminates at zero

Representations

In words: two hundred seventy
Ordinal: 270th
Roman numeral: CCLXX
Binary: 100001110
Octal: 416
Hexadecimal: 0x10E
Base64: AQ4=
One's complement: 65,265 (16-bit)

In other bases

ternary (3) 101000

quaternary (4) 10032

quinary (5) 2040

senary (6) 1130

septenary (7) 534

nonary (9) 330

undecimal (11) 226

duodecimal (12) 1a6

tridecimal (13) 17a

tetradecimal (14) 154

pentadecimal (15) 130

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋
Egyptian hieroglyphic: 𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆
Greek (Milesian): σοʹ
Mayan (base 20): 𝋭·𝋪
Chinese: 二百七十
Chinese (financial): 貳佰柒拾

In other modern scripts

Eastern Arabic ٢٧٠ Devanagari २७० Bengali ২৭০ Tamil ௨௭௦ Thai ๒๗๐ Tibetan ༢༧༠ Khmer ២៧០ Lao ໒໗໐ Burmese ၂၇၀

Digit at this position in famous constants

π — Pi (π): Digit 270 = 1
e — Euler's number (e): Digit 270 = 5
φ — Golden ratio (φ): Digit 270 = 2
√2 — Pythagoras's (√2): Digit 270 = 1
ln 2 — Natural log of 2: Digit 270 = 2
γ — Euler-Mascheroni (γ): Digit 270 = 2

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 270, here are decompositions:

7 + 263 = 270
13 + 257 = 270
19 + 251 = 270
29 + 241 = 270
31 + 239 = 270
37 + 233 = 270
41 + 229 = 270
43 + 227 = 270

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Capital Letter D With Caron

U+010E

Uppercase letter (Lu)

UTF-8 encoding: C4 8E (2 bytes).

Lookup U+010E on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00010E

RGB(0, 1, 14)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.14.

Address: 0.0.1.14
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.14

Unspecified address (0.0.0.0/8) — "this network" placeholder.

NANP area code 270

The number 270 is an active NANP area code (North American Numbering Plan).

Primary area: Bowling Green / Paducah
Region: Kentucky
Country: United States

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 270 ↗