138,012
138,012 is a composite number, even.
138,012 (one hundred thirty-eight thousand twelve) is an even 6-digit number. It is a composite number with 48 divisors, and factors as 2² × 3 × 7 × 31 × 53. Its proper divisors sum to 249,060, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21B1C.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 15
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 210,831
- Recamán's sequence
- a(492,803) = 138,012
- Square (n²)
- 19,047,312,144
- Cube (n³)
- 2,628,757,643,617,728
- Divisor count
- 48
- σ(n) — sum of divisors
- 387,072
- φ(n) — Euler's totient
- 37,440
- Sum of prime factors
- 98
Primality
Prime factorization: 2 2 × 3 × 7 × 31 × 53
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,012 = [371; (2, 742)]
Period length 2 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand twelve
- Ordinal
- 138012th
- Binary
- 100001101100011100
- Octal
- 415434
- Hexadecimal
- 0x21B1C
- Base64
- Ahsc
- One's complement
- 4,294,829,283 (32-bit)
- Scientific notation
- 1.38012 × 10⁵
- As a duration
- 138,012 s = 1 day, 14 hours, 20 minutes, 12 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋 𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληιβʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋠·𝋬
- Chinese
- 一十三萬八千零一十二
- Chinese (financial)
- 壹拾參萬捌仟零壹拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138012, here are decompositions:
- 5 + 138007 = 138012
- 13 + 137999 = 138012
- 19 + 137993 = 138012
- 29 + 137983 = 138012
- 71 + 137941 = 138012
- 79 + 137933 = 138012
- 101 + 137911 = 138012
- 103 + 137909 = 138012
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AC 9C (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.28.
- Address
- 0.2.27.28
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.28
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 138,012 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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.