138,620
138,620 is a composite number, even.
138,620 (one hundred thirty-eight thousand six hundred twenty) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 5 × 29 × 239. Its proper divisors sum to 163,780, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21D7C.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 26,831
- Recamán's sequence
- a(491,587) = 138,620
- Square (n²)
- 19,215,504,400
- Cube (n³)
- 2,663,653,219,928,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 302,400
- φ(n) — Euler's totient
- 53,312
- Sum of prime factors
- 277
Primality
Prime factorization: 2 2 × 5 × 29 × 239
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,620 = [372; (3, 6, 2, 148, 2, 6, 3, 744)]
Period length 8 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand six hundred twenty
- Ordinal
- 138620th
- Binary
- 100001110101111100
- Octal
- 416574
- Hexadecimal
- 0x21D7C
- Base64
- Ah18
- One's complement
- 4,294,828,675 (32-bit)
- Scientific notation
- 1.3862 × 10⁵
- As a duration
- 138,620 s = 1 day, 14 hours, 30 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρληχκʹ
- Mayan (base 20)
- 𝋱·𝋦·𝋫·𝋠
- Chinese
- 一十三萬八千六百二十
- Chinese (financial)
- 壹拾參萬捌仟陸佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138620, here are decompositions:
- 3 + 138617 = 138620
- 43 + 138577 = 138620
- 61 + 138559 = 138620
- 73 + 138547 = 138620
- 103 + 138517 = 138620
- 109 + 138511 = 138620
- 127 + 138493 = 138620
- 151 + 138469 = 138620
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B5 BC (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.29.124.
- Address
- 0.2.29.124
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.29.124
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 138,620 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.