Number

148

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

Ascending Digits Deficient Number Heptagonal Odious Number Pernicious Number Recamán's Sequence Year

Historical context — 148 AD

Calendar year

Year 148 (CXLVIII) was a leap year starting on Sunday of the Julian calendar.

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Historical context — 148 BC

Calendar year

Year 148 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: Leap year
Divisible by 4 and not by 100; February has 29 days.
Days in year: 366
ISO weeks: 52
Started on: Monday
January 1, 148
Ended on: Tuesday
December 31, 148
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 140s
140–149
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,878
1878 years before 2026.

In other calendars

Hebrew: 3908 / 3909 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Earth zodiac:Rat
Sexagenary cycle position 25 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 691 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 140 / 141 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 70 / 69 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 13
Digit product: 32
Digital root: 4
Palindrome: No
Bit width: 8 bits
Reversed: 841
Recamán's sequence: a(736) = 148
Square (n²): 21,904
Cube (n³): 3,241,792
Divisor count: 6
σ(n) — sum of divisors: 266
φ(n) — Euler's totient: 72
Sum of prime factors: 41

Primality

Prime factorization: 2 ² × 37

Nearest primes: 139 (−9) · 149 (+1)

Divisors & multiples

All divisors (6)

1 · 2 · 4 · 37 · 74 (half) · 148

Aliquot sum (sum of proper divisors): 118

Factor pairs (a × b = 148)

1 × 148

2 × 74

4 × 37

First multiples

148 · 296 (double) · 444 · 592 · 740 · 888 · 1,036 · 1,184 · 1,332 · 1,480

Sums & aliquot sequence

As a sum of two squares: 2² + 12²

As consecutive integers: 15 + 16 + … + 22

Aliquot sequence: 148 → 118 → 62 → 34 → 20 → 22 → 14 → 10 → 8 → 7 → 1 → 0 — terminates at zero

Representations

In words: one hundred forty-eight
Ordinal: 148th
Roman numeral: CXLVIII
Binary: 10010100
Octal: 224
Hexadecimal: 0x94
Base64: lA==
One's complement: 107 (8-bit)

In other bases

ternary (3) 12111

quaternary (4) 2110

quinary (5) 1043

senary (6) 404

septenary (7) 301

nonary (9) 174

undecimal (11) 125

duodecimal (12) 104

tridecimal (13) b5

tetradecimal (14) a8

pentadecimal (15) 9d

Historical numeral systems

Babylonian (base 60): 𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ρμηʹ
Mayan (base 20): 𝋧·𝋨
Chinese: 一百四十八
Chinese (financial): 壹佰肆拾捌

In other modern scripts

Eastern Arabic ١٤٨ Devanagari १४८ Bengali ১৪৮ Tamil ௧௪௮ Thai ๑๔๘ Tibetan ༡༤༨ Khmer ១៤៨ Lao ໑໔໘ Burmese ၁၄၈

Digit at this position in famous constants

π — Pi (π): Digit 148 = 8
e — Euler's number (e): Digit 148 = 5
φ — Golden ratio (φ): Digit 148 = 0
√2 — Pythagoras's (√2): Digit 148 = 7
ln 2 — Natural log of 2: Digit 148 = 1
γ — Euler-Mascheroni (γ): Digit 148 = 7

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 148, here are decompositions:

11 + 137 = 148
17 + 131 = 148
41 + 107 = 148
47 + 101 = 148
59 + 89 = 148

Unicode codepoint

Cancel Character

U+0094

Control character (Cc)

UTF-8 encoding: C2 94 (2 bytes).

Lookup U+0094 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000094

RGB(0, 0, 148)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.148.

Address: 0.0.0.148
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.148

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