16,409
16,409 is a composite number, odd.
16,409 (sixteen thousand four hundred nine) is an odd 5-digit number. It is a composite number with 4 divisors, and factors as 61 × 269. Written other ways, in hexadecimal, 0x4019.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 5
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 90,461
- Recamán's sequence
- a(17,894) = 16,409
- Square (n²)
- 269,255,281
- Cube (n³)
- 4,418,209,905,929
- Divisor count
- 4
- σ(n) — sum of divisors
- 16,740
- φ(n) — Euler's totient
- 16,080
- Sum of prime factors
- 330
Primality
Prime factorization: 61 × 269
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√16,409 = [128; (10, 4, 10, 256)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- sixteen thousand four hundred nine
- Ordinal
- 16409th
- Binary
- 100000000011001
- Octal
- 40031
- Hexadecimal
- 0x4019
- Base64
- QBk=
- One's complement
- 49,126 (16-bit)
- Scientific notation
- 1.6409 × 10⁴
- As a duration
- 16,409 s = 4 hours, 33 minutes, 29 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ιϛυθʹ
- Mayan (base 20)
- 𝋢·𝋡·𝋠·𝋩
- Chinese
- 一萬六千四百零九
- Chinese (financial)
- 壹萬陸仟肆佰零玖
Digit at this position in famous constants
- π — Pi (π)
- Digit 16,409 = 3
- e — Euler's number (e)
- Digit 16,409 = 5
- φ — Golden ratio (φ)
- Digit 16,409 = 3
- √2 — Pythagoras's (√2)
- Digit 16,409 = 6
- ln 2 — Natural log of 2
- Digit 16,409 = 8
- γ — Euler-Mascheroni (γ)
- Digit 16,409 = 0
Also seen as
UTF-8 encoding: E4 80 99 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.64.25.
- Address
- 0.0.64.25
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.64.25
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 16,409 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C10 (16744 Hz, -35¢)
- Scientific pitch (C4 = 256 Hz): C10 (16384 Hz, +3¢)
- Baroque pitch (A4 = 415 Hz): C♯10 (16731.8 Hz, -34¢)
The digit sequence 16409 first appears in π at position 12,566 of the decimal expansion (the 12,566ordinal-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.