138,398
138,398 is a composite number, even.
138,398 (one hundred thirty-eight thousand three hundred ninety-eight) is an even 6-digit number. It is a composite number with 8 divisors, and factors as 2 × 13 × 5,323. Written other ways, in hexadecimal, 0x21C9E.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 32
- Digit product
- 5,184
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 893,831
- Recamán's sequence
- a(492,031) = 138,398
- Square (n²)
- 19,154,006,404
- Cube (n³)
- 2,650,876,178,300,792
- Divisor count
- 8
- σ(n) — sum of divisors
- 223,608
- φ(n) — Euler's totient
- 63,864
- Sum of prime factors
- 5,338
Primality
Prime factorization: 2 × 13 × 5323
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,398 = [372; (53, 6, 1, 14, 3, 16, 1, 42, 1, 4, 1, 2, 2, 1, 3, 2, 2, 4, 13, 1, 4, 3, 4, 2, …)]
Representations
- In words
- one hundred thirty-eight thousand three hundred ninety-eight
- Ordinal
- 138398th
- Binary
- 100001110010011110
- Octal
- 416236
- Hexadecimal
- 0x21C9E
- Base64
- Ahye
- One's complement
- 4,294,828,897 (32-bit)
- Scientific notation
- 1.38398 × 10⁵
- As a duration
- 138,398 s = 1 day, 14 hours, 26 minutes, 38 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλητϟηʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋳·𝋲
- Chinese
- 一十三萬八千三百九十八
- Chinese (financial)
- 壹拾參萬捌仟參佰玖拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138398, here are decompositions:
- 61 + 138337 = 138398
- 79 + 138319 = 138398
- 109 + 138289 = 138398
- 151 + 138247 = 138398
- 157 + 138241 = 138398
- 241 + 138157 = 138398
- 457 + 137941 = 138398
- 487 + 137911 = 138398
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B2 9E (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.158.
- Address
- 0.2.28.158
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.158
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 138,398 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 138398 first appears in π at position 868,307 of the decimal expansion (the 868,307ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.