138,100
138,100 is a composite number, even.
138,100 (one hundred thirty-eight thousand one hundred) is an even 6-digit number. It is a composite number with 18 divisors, and factors as 2² × 5² × 1,381. Its proper divisors sum to 161,794, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21B74.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 13
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 1,831
- Recamán's sequence
- a(492,627) = 138,100
- Square (n²)
- 19,071,610,000
- Cube (n³)
- 2,633,789,341,000,000
- Divisor count
- 18
- σ(n) — sum of divisors
- 299,894
- φ(n) — Euler's totient
- 55,200
- Sum of prime factors
- 1,395
Primality
Prime factorization: 2 2 × 5 2 × 1381
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,100 = [371; (1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 11, 2, 4, 1, 3, 1, 3, 1, 34, 1, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand one hundred
- Ordinal
- 138100th
- Binary
- 100001101101110100
- Octal
- 415564
- Hexadecimal
- 0x21B74
- Base64
- Aht0
- One's complement
- 4,294,829,195 (32-bit)
- Scientific notation
- 1.381 × 10⁵
- As a duration
- 138,100 s = 1 day, 14 hours, 21 minutes, 40 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢
- Greek (Milesian)
- ͵ρληρʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋥·𝋠
- Chinese
- 一十三萬八千一百
- Chinese (financial)
- 壹拾參萬捌仟壹佰
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138100, here are decompositions:
- 23 + 138077 = 138100
- 29 + 138071 = 138100
- 41 + 138059 = 138100
- 47 + 138053 = 138100
- 59 + 138041 = 138100
- 101 + 137999 = 138100
- 107 + 137993 = 138100
- 167 + 137933 = 138100
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AD B4 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.116.
- Address
- 0.2.27.116
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.116
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 138,100 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.