28,742
28,742 is a composite number, even.
28,742 (twenty-eight thousand seven hundred forty-two) is an even 5-digit number. It is a composite number with 8 divisors, and factors as 2 × 7 × 2,053. Written other ways, in hexadecimal, 0x7046.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 23
- Digit product
- 896
- Digital root
- 5
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 24,782
- Square (n²)
- 826,102,564
- Cube (n³)
- 23,743,839,894,488
- Divisor count
- 8
- σ(n) — sum of divisors
- 49,296
- φ(n) — Euler's totient
- 12,312
- Sum of prime factors
- 2,062
Primality
Prime factorization: 2 × 7 × 2053
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√28,742 = [169; (1, 1, 6, 1, 2, 2, 25, 1, 1, 1, 10, 3, 1, 1, 1, 2, 1, 1, 3, 1, 1, 4, 48, 4, …)]
Period length 46 — the block in parentheses repeats forever.
Representations
- In words
- twenty-eight thousand seven hundred forty-two
- Ordinal
- 28742nd
- Binary
- 111000001000110
- Octal
- 70106
- Hexadecimal
- 0x7046
- Base64
- cEY=
- One's complement
- 36,793 (16-bit)
- Scientific notation
- 2.8742 × 10⁴
- As a duration
- 28,742 s = 7 hours, 59 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵κηψμβʹ
- Mayan (base 20)
- 𝋣·𝋫·𝋱·𝋢
- Chinese
- 二萬八千七百四十二
- Chinese (financial)
- 貳萬捌仟柒佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 28,742 = 7
- e — Euler's number (e)
- Digit 28,742 = 3
- φ — Golden ratio (φ)
- Digit 28,742 = 1
- √2 — Pythagoras's (√2)
- Digit 28,742 = 7
- ln 2 — Natural log of 2
- Digit 28,742 = 8
- γ — Euler-Mascheroni (γ)
- Digit 28,742 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 28742, here are decompositions:
- 13 + 28729 = 28742
- 19 + 28723 = 28742
- 31 + 28711 = 28742
- 73 + 28669 = 28742
- 79 + 28663 = 28742
- 139 + 28603 = 28742
- 151 + 28591 = 28742
- 163 + 28579 = 28742
Showing the first eight; more decompositions exist.
UTF-8 encoding: E7 81 86 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.112.70.
- Address
- 0.0.112.70
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.112.70
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 28742 first appears in π at position 66,989 of the decimal expansion (the 66,989ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.