139,472
139,472 is a composite number, even.
139,472 (one hundred thirty-nine thousand four hundred seventy-two) is an even 6-digit number. It is a composite number with 20 divisors, and factors as 2⁴ × 23 × 379. Its proper divisors sum to 143,248, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x220D0.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 26
- Digit product
- 1,512
- Digital root
- 8
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 274,931
- Recamán's sequence
- a(489,883) = 139,472
- Square (n²)
- 19,452,438,784
- Cube (n³)
- 2,713,070,542,082,048
- Divisor count
- 20
- σ(n) — sum of divisors
- 282,720
- φ(n) — Euler's totient
- 66,528
- Sum of prime factors
- 410
Primality
Prime factorization: 2 4 × 23 × 379
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√139,472 = [373; (2, 5, 1, 2, 16, 1, 1, 1, 1, 1, 16, 2, 1, 5, 2, 746)]
Period length 16 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-nine thousand four hundred seventy-two
- Ordinal
- 139472nd
- Binary
- 100010000011010000
- Octal
- 420320
- Hexadecimal
- 0x220D0
- Base64
- AiDQ
- One's complement
- 4,294,827,823 (32-bit)
- Scientific notation
- 1.39472 × 10⁵
- As a duration
- 139,472 s = 1 day, 14 hours, 44 minutes, 32 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρλθυοβʹ
- Mayan (base 20)
- 𝋱·𝋨·𝋭·𝋬
- Chinese
- 一十三萬九千四百七十二
- Chinese (financial)
- 壹拾參萬玖仟肆佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 139472, here are decompositions:
- 13 + 139459 = 139472
- 43 + 139429 = 139472
- 79 + 139393 = 139472
- 103 + 139369 = 139472
- 139 + 139333 = 139472
- 163 + 139309 = 139472
- 181 + 139291 = 139472
- 199 + 139273 = 139472
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 83 90 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.32.208.
- Address
- 0.2.32.208
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.32.208
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 139,472 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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.