138,472
138,472 is a composite number, even.
138,472 (one hundred thirty-eight thousand four hundred seventy-two) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2³ × 19 × 911. Written other ways, in hexadecimal, 0x21CE8.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 25
- Digit product
- 1,344
- Digital root
- 7
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 274,831
- Recamán's sequence
- a(491,883) = 138,472
- Square (n²)
- 19,174,494,784
- Cube (n³)
- 2,655,130,641,730,048
- Divisor count
- 16
- σ(n) — sum of divisors
- 273,600
- φ(n) — Euler's totient
- 65,520
- Sum of prime factors
- 936
Primality
Prime factorization: 2 3 × 19 × 911
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,472 = [372; (8, 2, 5, 5, 1, 30, 5, 1, 4, 1, 4, 9, 1, 81, 1, 3, 1, 3, 1, 1, 1, 1, 8, 1, …)]
Representations
- In words
- one hundred thirty-eight thousand four hundred seventy-two
- Ordinal
- 138472nd
- Binary
- 100001110011101000
- Octal
- 416350
- Hexadecimal
- 0x21CE8
- Base64
- Ahzo
- One's complement
- 4,294,828,823 (32-bit)
- Scientific notation
- 1.38472 × 10⁵
- As a duration
- 138,472 s = 1 day, 14 hours, 27 minutes, 52 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρληυοβʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋣·𝋬
- Chinese
- 一十三萬八千四百七十二
- Chinese (financial)
- 壹拾參萬捌仟肆佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138472, here are decompositions:
- 3 + 138469 = 138472
- 11 + 138461 = 138472
- 23 + 138449 = 138472
- 71 + 138401 = 138472
- 83 + 138389 = 138472
- 101 + 138371 = 138472
- 149 + 138323 = 138472
- 233 + 138239 = 138472
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B3 A8 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.28.232.
- Address
- 0.2.28.232
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.28.232
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 138,472 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 138472 first appears in π at position 263,686 of the decimal expansion (the 263,686ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.