138,998
138,998 is a composite number, even.
138,998 (one hundred thirty-eight thousand nine hundred ninety-eight) is an even 6-digit number. It is a composite number with 4 divisors, and factors as 2 × 69,499. Written other ways, in hexadecimal, 0x21EF6.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 38
- Digit product
- 15,552
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 899,831
- Recamán's sequence
- a(490,831) = 138,998
- Square (n²)
- 19,320,444,004
- Cube (n³)
- 2,685,503,075,667,992
- Divisor count
- 4
- σ(n) — sum of divisors
- 208,500
- φ(n) — Euler's totient
- 69,498
- Sum of prime factors
- 69,501
Primality
Prime factorization: 2 × 69499
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,998 = [372; (1, 4, 1, 2, 3, 1, 5, 9, 1, 9, 3, 5, 23, 1, 6, 2, 2, 1, 3, 1, 3, 17, 1, 11, …)]
Representations
- In words
- one hundred thirty-eight thousand nine hundred ninety-eight
- Ordinal
- 138998th
- Binary
- 100001111011110110
- Octal
- 417366
- Hexadecimal
- 0x21EF6
- Base64
- Ah72
- One's complement
- 4,294,828,297 (32-bit)
- Scientific notation
- 1.38998 × 10⁵
- As a duration
- 138,998 s = 1 day, 14 hours, 36 minutes, 38 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληϡϟηʹ
- Mayan (base 20)
- 𝋱·𝋧·𝋩·𝋲
- Chinese
- 一十三萬八千九百九十八
- Chinese (financial)
- 壹拾參萬捌仟玖佰玖拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138998, here are decompositions:
- 31 + 138967 = 138998
- 61 + 138937 = 138998
- 109 + 138889 = 138998
- 157 + 138841 = 138998
- 199 + 138799 = 138998
- 271 + 138727 = 138998
- 337 + 138661 = 138998
- 421 + 138577 = 138998
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 BB B6 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.30.246.
- Address
- 0.2.30.246
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.30.246
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 138,998 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.