40,018
40,018 is a composite number, even.
40,018 (forty thousand eighteen) is an even 5-digit number. It is a composite number with 16 divisors, and factors as 2 × 11 × 17 × 107. Written other ways, in hexadecimal, 0x9C52.
Interestingness
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 13
- Digit product
- 0
- Digital root
- 4
- Palindrome
- No
- Bit width
- 16 bits
- Reversed
- 81,004
- Square (n²)
- 1,601,440,324
- Cube (n³)
- 64,086,438,885,832
- Divisor count
- 16
- σ(n) — sum of divisors
- 69,984
- φ(n) — Euler's totient
- 16,960
- Sum of prime factors
- 137
Primality
Prime factorization: 2 × 11 × 17 × 107
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√40,018 = [200; (22, 4, 2, 4, 2, 44, 200, 44, 2, 4, 2, 4, 22, 400)]
Period length 14 — the block in parentheses repeats forever.
Representations
- In words
- forty thousand eighteen
- Ordinal
- 40018th
- Binary
- 1001110001010010
- Octal
- 116122
- Hexadecimal
- 0x9C52
- Base64
- nFI=
- One's complement
- 25,517 (16-bit)
- Scientific notation
- 4.0018 × 10⁴
- As a duration
- 40,018 s = 11 hours, 6 minutes, 58 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵μιηʹ
- Mayan (base 20)
- 𝋥·𝋠·𝋠·𝋲
- Chinese
- 四萬零一十八
- Chinese (financial)
- 肆萬零壹拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 40,018 = 7
- e — Euler's number (e)
- Digit 40,018 = 5
- φ — Golden ratio (φ)
- Digit 40,018 = 9
- √2 — Pythagoras's (√2)
- Digit 40,018 = 5
- ln 2 — Natural log of 2
- Digit 40,018 = 1
- γ — Euler-Mascheroni (γ)
- Digit 40,018 = 3
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 40018, here are decompositions:
- 5 + 40013 = 40018
- 29 + 39989 = 40018
- 47 + 39971 = 40018
- 89 + 39929 = 40018
- 131 + 39887 = 40018
- 149 + 39869 = 40018
- 179 + 39839 = 40018
- 191 + 39827 = 40018
Showing the first eight; more decompositions exist.
UTF-8 encoding: E9 B1 92 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.156.82.
- Address
- 0.0.156.82
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.156.82
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 40018 first appears in π at position 130,558 of the decimal expansion (the 130,558ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.