138,738
138,738 is a composite number, even.
138,738 (one hundred thirty-eight thousand seven hundred thirty-eight) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 3 × 19 × 1,217. Its proper divisors sum to 153,582, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21DF2.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 30
- Digit product
- 4,032
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 837,831
- Recamán's sequence
- a(491,351) = 138,738
- Square (n²)
- 19,248,232,644
- Cube (n³)
- 2,670,461,300,563,272
- Divisor count
- 16
- σ(n) — sum of divisors
- 292,320
- φ(n) — Euler's totient
- 43,776
- Sum of prime factors
- 1,241
Primality
Prime factorization: 2 × 3 × 19 × 1217
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,738 = [372; (2, 9, 1, 2, 2, 1, 1, 4, 10, 3, 1, 1, 1, 4, 1, 1, 1, 1, 3, 1, 5, 1, 4, 4, …)]
Period length 50 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand seven hundred thirty-eight
- Ordinal
- 138738th
- Binary
- 100001110111110010
- Octal
- 416762
- Hexadecimal
- 0x21DF2
- Base64
- Ah3y
- One's complement
- 4,294,828,557 (32-bit)
- Scientific notation
- 1.38738 × 10⁵
- As a duration
- 138,738 s = 1 day, 14 hours, 32 minutes, 18 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληψληʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋰·𝋲
- Chinese
- 一十三萬八千七百三十八
- Chinese (financial)
- 壹拾參萬捌仟柒佰參拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138738, here are decompositions:
- 7 + 138731 = 138738
- 11 + 138727 = 138738
- 59 + 138679 = 138738
- 97 + 138641 = 138738
- 101 + 138637 = 138738
- 109 + 138629 = 138738
- 139 + 138599 = 138738
- 151 + 138587 = 138738
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B7 B2 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.242.
- Address
- 0.2.29.242
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.242
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 138,738 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 138738 first appears in π at position 538,435 of the decimal expansion (the 538,435ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.