138,431
138,431 is a composite number, odd.
138,431 (one hundred thirty-eight thousand four hundred thirty-one) is an odd 6-digit number. It is a composite number with 6 divisors, and factors as 17² × 479. Written other ways, in hexadecimal, 0x21CBF.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 288
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 134,831
- Recamán's sequence
- a(491,965) = 138,431
- Square (n²)
- 19,163,141,761
- Cube (n³)
- 2,652,772,877,116,991
- Divisor count
- 6
- σ(n) — sum of divisors
- 147,360
- φ(n) — Euler's totient
- 130,016
- Sum of prime factors
- 513
Primality
Prime factorization: 17 2 × 479
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,431 = [372; (15, 1, 4, 1, 11, 1, 3, 1, 1, 3, 1, 1, 1, 1, 1, 14, 3, 1, 4, 1, 3, 1, 38, 2, …)]
Representations
- In words
- one hundred thirty-eight thousand four hundred thirty-one
- Ordinal
- 138431st
- Binary
- 100001110010111111
- Octal
- 416277
- Hexadecimal
- 0x21CBF
- Base64
- Ahy/
- One's complement
- 4,294,828,864 (32-bit)
- Scientific notation
- 1.38431 × 10⁵
- As a duration
- 138,431 s = 1 day, 14 hours, 27 minutes, 11 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓏺
- Greek (Milesian)
- ͵ρληυλαʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋡·𝋫
- Chinese
- 一十三萬八千四百三十一
- Chinese (financial)
- 壹拾參萬捌仟肆佰參拾壹
Also seen as
UTF-8 encoding: F0 A1 B2 BF (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.191.
- Address
- 0.2.28.191
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.191
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 138,431 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 138431 first appears in π at position 178,319 of the decimal expansion (the 178,319ordinal-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.