139,840
139,840 is a composite number, even.
139,840 (one hundred thirty-nine thousand eight hundred forty) is an even 6-digit number. It is a composite number with 56 divisors, and factors as 2⁶ × 5 × 19 × 23. Its proper divisors sum to 225,920, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x22240.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 25
- Digit product
- 0
- Digital root
- 7
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 48,931
- Recamán's sequence
- a(489,147) = 139,840
- Square (n²)
- 19,555,225,600
- Cube (n³)
- 2,734,602,747,904,000
- Divisor count
- 56
- σ(n) — sum of divisors
- 365,760
- φ(n) — Euler's totient
- 50,688
- Sum of prime factors
- 59
Primality
Prime factorization: 2 6 × 5 × 19 × 23
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√139,840 = [373; (1, 19, 1, 3, 2, 8, 1, 3, 1, 3, 49, 1, 1, 2, 12, 15, 5, 2, 9, 82, 1, 185, 1, 82, …)]
Period length 44 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-nine thousand eight hundred forty
- Ordinal
- 139840th
- Binary
- 100010001001000000
- Octal
- 421100
- Hexadecimal
- 0x22240
- Base64
- AiJA
- One's complement
- 4,294,827,455 (32-bit)
- Scientific notation
- 1.3984 × 10⁵
- As a duration
- 139,840 s = 1 day, 14 hours, 50 minutes, 40 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρλθωμʹ
- Mayan (base 20)
- 𝋱·𝋩·𝋬·𝋠
- Chinese
- 一十三萬九千八百四十
- Chinese (financial)
- 壹拾參萬玖仟捌佰肆拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 139840, here are decompositions:
- 3 + 139837 = 139840
- 53 + 139787 = 139840
- 101 + 139739 = 139840
- 131 + 139709 = 139840
- 137 + 139703 = 139840
- 179 + 139661 = 139840
- 251 + 139589 = 139840
- 269 + 139571 = 139840
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 89 80 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.34.64.
- Address
- 0.2.34.64
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.34.64
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 139,840 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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.