142,728
142,728 is a composite number, even.
142,728 (one hundred forty-two thousand seven hundred twenty-eight) is an even 6-digit number. It is a composite number with 32 divisors, and factors as 2³ × 3 × 19 × 313. Its proper divisors sum to 234,072, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x22D88.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 24
- Digit product
- 896
- Digital root
- 6
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 827,241
- Recamán's sequence
- a(222,960) = 142,728
- Square (n²)
- 20,371,281,984
- Cube (n³)
- 2,907,552,335,012,352
- Divisor count
- 32
- σ(n) — sum of divisors
- 376,800
- φ(n) — Euler's totient
- 44,928
- Sum of prime factors
- 341
Primality
Prime factorization: 2 3 × 3 × 19 × 313
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√142,728 = [377; (1, 3, 1, 5, 2, 4, 94, 4, 2, 5, 1, 3, 1, 754)]
Period length 14 — the block in parentheses repeats forever.
Representations
- In words
- one hundred forty-two thousand seven hundred twenty-eight
- Ordinal
- 142728th
- Binary
- 100010110110001000
- Octal
- 426610
- Hexadecimal
- 0x22D88
- Base64
- Ai2I
- One's complement
- 4,294,824,567 (32-bit)
- Scientific notation
- 1.42728 × 10⁵
- As a duration
- 142,728 s = 1 day, 15 hours, 38 minutes, 48 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρμβψκηʹ
- Mayan (base 20)
- 𝋱·𝋰·𝋰·𝋨
- Chinese
- 一十四萬二千七百二十八
- Chinese (financial)
- 壹拾肆萬貳仟柒佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 142728, here are decompositions:
- 17 + 142711 = 142728
- 29 + 142699 = 142728
- 31 + 142697 = 142728
- 71 + 142657 = 142728
- 109 + 142619 = 142728
- 127 + 142601 = 142728
- 137 + 142591 = 142728
- 139 + 142589 = 142728
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A2 B6 88 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.45.136.
- Address
- 0.2.45.136
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.45.136
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 142,728 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 142728 first appears in π at position 968,731 of the decimal expansion (the 968,731ordinal-suffix:st 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°.