138,248
138,248 is a composite number, even.
138,248 (one hundred thirty-eight thousand two hundred forty-eight) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2³ × 11 × 1,571. Its proper divisors sum to 144,712, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21C08.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 26
- Digit product
- 1,536
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 842,831
- Recamán's sequence
- a(492,331) = 138,248
- Square (n²)
- 19,112,509,504
- Cube (n³)
- 2,642,266,213,908,992
- Divisor count
- 16
- σ(n) — sum of divisors
- 282,960
- φ(n) — Euler's totient
- 62,800
- Sum of prime factors
- 1,588
Primality
Prime factorization: 2 3 × 11 × 1571
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,248 = [371; (1, 4, 2, 7, 1, 1, 1, 2, 4, 6, 2, 1, 5, 5, 1, 4, 1, 1, 2, 3, 1, 1, 3, 2, …)]
Period length 54 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand two hundred forty-eight
- Ordinal
- 138248th
- Binary
- 100001110000001000
- Octal
- 416010
- Hexadecimal
- 0x21C08
- Base64
- AhwI
- One's complement
- 4,294,829,047 (32-bit)
- Scientific notation
- 1.38248 × 10⁵
- As a duration
- 138,248 s = 1 day, 14 hours, 24 minutes, 8 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλησμηʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋬·𝋨
- Chinese
- 一十三萬八千二百四十八
- Chinese (financial)
- 壹拾參萬捌仟貳佰肆拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138248, here are decompositions:
- 7 + 138241 = 138248
- 67 + 138181 = 138248
- 109 + 138139 = 138248
- 241 + 138007 = 138248
- 307 + 137941 = 138248
- 337 + 137911 = 138248
- 379 + 137869 = 138248
- 421 + 137827 = 138248
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B0 88 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.8.
- Address
- 0.2.28.8
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.8
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 138,248 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.