138,988
138,988 is a composite number, even.
138,988 (one hundred thirty-eight thousand nine hundred eighty-eight) is an even 6-digit number. It is a composite number with 6 divisors, and factors as 2² × 34,747. Written other ways, in hexadecimal, 0x21EEC.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 37
- Digit product
- 13,824
- Digital root
- 1
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 889,831
- Recamán's sequence
- a(490,851) = 138,988
- Square (n²)
- 19,317,664,144
- Cube (n³)
- 2,684,923,504,046,272
- Divisor count
- 6
- σ(n) — sum of divisors
- 243,236
- φ(n) — Euler's totient
- 69,492
- Sum of prime factors
- 34,751
Primality
Prime factorization: 2 2 × 34747
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,988 = [372; (1, 4, 3, 2, 5, 19, 1, 30, 8, 1, 1, 6, 14, 2, 7, 20, 1, 1, 2, 1, 2, 2, 1, 4, …)]
Representations
- In words
- one hundred thirty-eight thousand nine hundred eighty-eight
- Ordinal
- 138988th
- Binary
- 100001111011101100
- Octal
- 417354
- Hexadecimal
- 0x21EEC
- Base64
- Ah7s
- One's complement
- 4,294,828,307 (32-bit)
- Scientific notation
- 1.38988 × 10⁵
- As a duration
- 138,988 s = 1 day, 14 hours, 36 minutes, 28 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληϡπηʹ
- Mayan (base 20)
- 𝋱·𝋧·𝋩·𝋨
- Chinese
- 一十三萬八千九百八十八
- Chinese (financial)
- 壹拾參萬捌仟玖佰捌拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138988, here are decompositions:
- 11 + 138977 = 138988
- 29 + 138959 = 138988
- 71 + 138917 = 138988
- 89 + 138899 = 138988
- 167 + 138821 = 138988
- 191 + 138797 = 138988
- 257 + 138731 = 138988
- 347 + 138641 = 138988
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 BB AC (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.30.236.
- Address
- 0.2.30.236
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.30.236
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 138,988 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 138988 first appears in π at position 462,879 of the decimal expansion (the 462,879ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.