138,628
138,628 is a composite number, even.
138,628 (one hundred thirty-eight thousand six hundred twenty-eight) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 7 × 4,951. Its proper divisors sum to 138,684, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21D84.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 28
- Digit product
- 2,304
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 826,831
- Recamán's sequence
- a(491,571) = 138,628
- Square (n²)
- 19,217,722,384
- Cube (n³)
- 2,664,114,418,649,152
- Divisor count
- 12
- σ(n) — sum of divisors
- 277,312
- φ(n) — Euler's totient
- 59,400
- Sum of prime factors
- 4,962
Primality
Prime factorization: 2 2 × 7 × 4951
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,628 = [372; (3, 19, 1, 3, 1, 4, 1, 1, 1, 3, 7, 2, 13, 1, 5, 1, 3, 2, 247, 1, 3, 2, 6, 3, …)]
Representations
- In words
- one hundred thirty-eight thousand six hundred twenty-eight
- Ordinal
- 138628th
- Binary
- 100001110110000100
- Octal
- 416604
- Hexadecimal
- 0x21D84
- Base64
- Ah2E
- One's complement
- 4,294,828,667 (32-bit)
- Scientific notation
- 1.38628 × 10⁵
- As a duration
- 138,628 s = 1 day, 14 hours, 30 minutes, 28 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληχκηʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋫·𝋨
- Chinese
- 一十三萬八千六百二十八
- Chinese (financial)
- 壹拾參萬捌仟陸佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138628, here are decompositions:
- 11 + 138617 = 138628
- 29 + 138599 = 138628
- 41 + 138587 = 138628
- 47 + 138581 = 138628
- 59 + 138569 = 138628
- 131 + 138497 = 138628
- 167 + 138461 = 138628
- 179 + 138449 = 138628
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B6 84 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.132.
- Address
- 0.2.29.132
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.132
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 138,628 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.