138,028
138,028 is a composite number, even.
138,028 (one hundred thirty-eight thousand twenty-eight) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 11 × 3,137. Written other ways, in hexadecimal, 0x21B2C.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 22
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 820,831
- Recamán's sequence
- a(492,771) = 138,028
- Square (n²)
- 19,051,728,784
- Cube (n³)
- 2,629,672,020,597,952
- Divisor count
- 12
- σ(n) — sum of divisors
- 263,592
- φ(n) — Euler's totient
- 62,720
- Sum of prime factors
- 3,152
Primality
Prime factorization: 2 2 × 11 × 3137
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,028 = [371; (1, 1, 11, 3, 2, 2, 26, 7, 1, 19, 1, 3, 4, 14, 1, 13, 11, 1, 2, 1, 1, 1, 1, 8, …)]
Representations
- In words
- one hundred thirty-eight thousand twenty-eight
- Ordinal
- 138028th
- Binary
- 100001101100101100
- Octal
- 415454
- Hexadecimal
- 0x21B2C
- Base64
- Ahss
- One's complement
- 4,294,829,267 (32-bit)
- Scientific notation
- 1.38028 × 10⁵
- As a duration
- 138,028 s = 1 day, 14 hours, 20 minutes, 28 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληκηʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋡·𝋨
- Chinese
- 一十三萬八千零二十八
- Chinese (financial)
- 壹拾參萬捌仟零貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138028, here are decompositions:
- 29 + 137999 = 138028
- 71 + 137957 = 138028
- 101 + 137927 = 138028
- 179 + 137849 = 138028
- 197 + 137831 = 138028
- 251 + 137777 = 138028
- 257 + 137771 = 138028
- 389 + 137639 = 138028
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AC AC (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.44.
- Address
- 0.2.27.44
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.44
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 138,028 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 138028 first appears in π at position 515,520 of the decimal expansion (the 515,520ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.