138,220
138,220 is a composite number, even.
138,220 (one hundred thirty-eight thousand two hundred twenty) is an even 6-digit number. It is a composite number with 12 divisors, and factors as 2² × 5 × 6,911. Its proper divisors sum to 152,084, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21BEC.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 16
- Digit product
- 0
- Digital root
- 7
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 22,831
- Recamán's sequence
- a(492,387) = 138,220
- Square (n²)
- 19,104,768,400
- Cube (n³)
- 2,640,661,088,248,000
- Divisor count
- 12
- σ(n) — sum of divisors
- 290,304
- φ(n) — Euler's totient
- 55,280
- Sum of prime factors
- 6,920
Primality
Prime factorization: 2 2 × 5 × 6911
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,220 = [371; (1, 3, 1, 1, 6, 1, 1, 2, 6, 3, 3, 2, 67, 6, 5, 1, 1, 25, 10, 2, 3, 3, 1, 5, …)]
Representations
- In words
- one hundred thirty-eight thousand two hundred twenty
- Ordinal
- 138220th
- Binary
- 100001101111101100
- Octal
- 415754
- Hexadecimal
- 0x21BEC
- Base64
- Ahvs
- One's complement
- 4,294,829,075 (32-bit)
- Scientific notation
- 1.3822 × 10⁵
- As a duration
- 138,220 s = 1 day, 14 hours, 23 minutes, 40 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρλησκʹ
- Mayan (base 20)
- 𝋱·𝋥·𝋫·𝋠
- Chinese
- 一十三萬八千二百二十
- Chinese (financial)
- 壹拾參萬捌仟貳佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138220, here are decompositions:
- 11 + 138209 = 138220
- 23 + 138197 = 138220
- 29 + 138191 = 138220
- 41 + 138179 = 138220
- 107 + 138113 = 138220
- 113 + 138107 = 138220
- 149 + 138071 = 138220
- 167 + 138053 = 138220
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 AF AC (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.27.236.
- Address
- 0.2.27.236
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.27.236
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 138,220 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 138220 first appears in π at position 245,936 of the decimal expansion (the 245,936ordinal-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.