139,428
139,428 is a composite number, even.
139,428 (one hundred thirty-nine thousand four hundred twenty-eight) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 3³ × 1,291. Its proper divisors sum to 222,332, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x220A4.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 27
- Digit product
- 1,728
- Digital root
- 9
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 824,931
- Recamán's sequence
- a(489,971) = 139,428
- Square (n²)
- 19,440,167,184
- Cube (n³)
- 2,710,503,630,130,752
- Divisor count
- 24
- σ(n) — sum of divisors
- 361,760
- φ(n) — Euler's totient
- 46,440
- Sum of prime factors
- 1,304
Primality
Prime factorization: 2 2 × 3 3 × 1291
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√139,428 = [373; (2, 2, 67, 2, 27, 6, 7, 2, 1, 1, 1, 4, 1, 82, 6, 2, 2, 1, 6, 1, 4, 1, 26, 1, …)]
Period length 46 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-nine thousand four hundred twenty-eight
- Ordinal
- 139428th
- Binary
- 100010000010100100
- Octal
- 420244
- Hexadecimal
- 0x220A4
- Base64
- AiCk
- One's complement
- 4,294,827,867 (32-bit)
- Scientific notation
- 1.39428 × 10⁵
- As a duration
- 139,428 s = 1 day, 14 hours, 43 minutes, 48 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλθυκηʹ
- Mayan (base 20)
- 𝋱·𝋨·𝋫·𝋨
- Chinese
- 一十三萬九千四百二十八
- Chinese (financial)
- 壹拾參萬玖仟肆佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 139428, here are decompositions:
- 5 + 139423 = 139428
- 19 + 139409 = 139428
- 31 + 139397 = 139428
- 41 + 139387 = 139428
- 59 + 139369 = 139428
- 61 + 139367 = 139428
- 67 + 139361 = 139428
- 89 + 139339 = 139428
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 82 A4 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.32.164.
- Address
- 0.2.32.164
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.32.164
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 139,428 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 139428 first appears in π at position 273,539 of the decimal expansion (the 273,539ordinal-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°.