3,998
3,998 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 29
- Digit product
- 1,944
- Digital root
- 2
- Palindrome
- No
- Bit width
- 12 bits
- Reversed
- 8,993
- Recamán's sequence
- a(14,395) = 3,998
- Square (n²)
- 15,984,004
- Cube (n³)
- 63,904,047,992
- Divisor count
- 4
- σ(n) — sum of divisors
- 6,000
- φ(n) — Euler's totient
- 1,998
- Sum of prime factors
- 2,001
Primality
Prime factorization: 2 × 1999
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- three thousand nine hundred ninety-eight
- Ordinal
- 3998th
- Roman numeral
- MMMCMXCVIII
- Binary
- 111110011110
- Octal
- 7636
- Hexadecimal
- 0xF9E
- Base64
- D54=
- One's complement
- 61,537 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵γϡϟηʹ
- Mayan (base 20)
- 𝋩·𝋳·𝋲
- Chinese
- 三千九百九十八
- Chinese (financial)
- 參仟玖佰玖拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 3,998 = 0
- e — Euler's number (e)
- Digit 3,998 = 9
- φ — Golden ratio (φ)
- Digit 3,998 = 3
- √2 — Pythagoras's (√2)
- Digit 3,998 = 7
- ln 2 — Natural log of 2
- Digit 3,998 = 3
- γ — Euler-Mascheroni (γ)
- Digit 3,998 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 3998, here are decompositions:
- 31 + 3967 = 3998
- 67 + 3931 = 3998
- 79 + 3919 = 3998
- 109 + 3889 = 3998
- 151 + 3847 = 3998
- 229 + 3769 = 3998
- 271 + 3727 = 3998
- 307 + 3691 = 3998
Showing the first eight; more decompositions exist.
UTF-8 encoding: E0 BE 9E (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.15.158.
- Address
- 0.0.15.158
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.15.158
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 3998 first appears in π at position 11,279 of the decimal expansion (the 11,279ordinal-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.