138,450
138,450 is a composite number, even.
138,450 (one hundred thirty-eight thousand four hundred fifty) is an even 6-digit number. It is a composite number with 48 divisors, and factors as 2 × 3 × 5² × 13 × 71. Its proper divisors sum to 236,526, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21CD2.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 21
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 54,831
- Recamán's sequence
- a(491,927) = 138,450
- Square (n²)
- 19,168,402,500
- Cube (n³)
- 2,653,865,326,125,000
- Divisor count
- 48
- σ(n) — sum of divisors
- 374,976
- φ(n) — Euler's totient
- 33,600
- Sum of prime factors
- 99
Primality
Prime factorization: 2 × 3 × 5 2 × 13 × 71
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,450 = [372; (11, 3, 1, 1, 1, 5, 1, 1, 18, 1, 1, 5, 1, 1, 1, 3, 11, 744)]
Period length 18 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand four hundred fifty
- Ordinal
- 138450th
- Binary
- 100001110011010010
- Octal
- 416322
- Hexadecimal
- 0x21CD2
- Base64
- AhzS
- One's complement
- 4,294,828,845 (32-bit)
- Scientific notation
- 1.3845 × 10⁵
- As a duration
- 138,450 s = 1 day, 14 hours, 27 minutes, 30 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρληυνʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋢·𝋪
- Chinese
- 一十三萬八千四百五十
- Chinese (financial)
- 壹拾參萬捌仟肆佰伍拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138450, here are decompositions:
- 17 + 138433 = 138450
- 23 + 138427 = 138450
- 43 + 138407 = 138450
- 47 + 138403 = 138450
- 61 + 138389 = 138450
- 79 + 138371 = 138450
- 101 + 138349 = 138450
- 113 + 138337 = 138450
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B3 92 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.210.
- Address
- 0.2.28.210
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.210
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 138,450 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°.