40,400
40,400 is a composite number, even.
Properties
Primality
Prime factorization: 2 4 × 5 2 × 101
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- forty thousand four hundred
- Ordinal
- 40400th
- Binary
- 1001110111010000
- Octal
- 116720
- Hexadecimal
- 0x9DD0
- Base64
- ndA=
- One's complement
- 25,135 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒌋𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓂍𓍢𓍢𓍢𓍢
- Greek (Milesian)
- ͵μυʹ
- Mayan (base 20)
- 𝋥·𝋡·𝋠·𝋠
- Chinese
- 四萬零四百
- Chinese (financial)
- 肆萬零肆佰
Digit at this position in famous constants
- π — Pi (π)
- Digit 40,400 = 7
- e — Euler's number (e)
- Digit 40,400 = 4
- φ — Golden ratio (φ)
- Digit 40,400 = 7
- √2 — Pythagoras's (√2)
- Digit 40,400 = 4
- ln 2 — Natural log of 2
- Digit 40,400 = 1
- γ — Euler-Mascheroni (γ)
- Digit 40,400 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 40400, here are decompositions:
- 13 + 40387 = 40400
- 43 + 40357 = 40400
- 163 + 40237 = 40400
- 211 + 40189 = 40400
- 223 + 40177 = 40400
- 271 + 40129 = 40400
- 277 + 40123 = 40400
- 307 + 40093 = 40400
Showing the first eight; more decompositions exist.
UTF-8 encoding: E9 B7 90 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.157.208.
- Address
- 0.0.157.208
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.157.208
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This passes the ABA routing number checksum and matches the Federal Reserve numbering scheme.
Banks operate many routing numbers per state and division; an unmatched checksum-valid number can still be a real RTN at a smaller institution.
The digit sequence 40400 first appears in π at position 13,085 of the decimal expansion (the 13,085ordinal-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.