155,904
155,904 is a composite number, even.
155,904 (one hundred fifty-five thousand nine hundred four) is an even 6-digit number. It is a composite number with 72 divisors, and factors as 2⁸ × 3 × 7 × 29. Its proper divisors sum to 334,656, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x26100.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 24
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 409,551
- Recamán's sequence
- a(206,056) = 155,904
- Square (n²)
- 24,306,057,216
- Cube (n³)
- 3,789,411,544,203,264
- Divisor count
- 72
- σ(n) — sum of divisors
- 490,560
- φ(n) — Euler's totient
- 43,008
- Sum of prime factors
- 55
Primality
Prime factorization: 2 8 × 3 × 7 × 29
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√155,904 = [394; (1, 5, 1, 1, 8, 1, 1, 5, 1, 788)]
Period length 10 — the block in parentheses repeats forever.
Representations
- In words
- one hundred fifty-five thousand nine hundred four
- Ordinal
- 155904th
- Binary
- 100110000100000000
- Octal
- 460400
- Hexadecimal
- 0x26100
- Base64
- AmEA
- One's complement
- 4,294,811,391 (32-bit)
- Scientific notation
- 1.55904 × 10⁵
- As a duration
- 155,904 s = 1 day, 19 hours, 18 minutes, 24 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρνεϡδʹ
- Mayan (base 20)
- 𝋳·𝋩·𝋯·𝋤
- Chinese
- 一十五萬五千九百零四
- Chinese (financial)
- 壹拾伍萬伍仟玖佰零肆
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 155904, here are decompositions:
- 11 + 155893 = 155904
- 13 + 155891 = 155904
- 17 + 155887 = 155904
- 41 + 155863 = 155904
- 43 + 155861 = 155904
- 53 + 155851 = 155904
- 71 + 155833 = 155904
- 83 + 155821 = 155904
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A6 84 80 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.97.0.
- Address
- 0.2.97.0
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.97.0
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 155,904 and was likely granted around 1873.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 155904 first appears in π at position 464,836 of the decimal expansion (the 464,836ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.