138,828
138,828 is a composite number, even.
138,828 (one hundred thirty-eight thousand eight hundred twenty-eight) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 3 × 23 × 503. Its proper divisors sum to 199,860, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x21E4C.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 30
- Digit product
- 3,072
- Digital root
- 3
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 828,831
- Recamán's sequence
- a(491,171) = 138,828
- Square (n²)
- 19,273,213,584
- Cube (n³)
- 2,675,661,695,439,552
- Divisor count
- 24
- σ(n) — sum of divisors
- 338,688
- φ(n) — Euler's totient
- 44,176
- Sum of prime factors
- 533
Primality
Prime factorization: 2 2 × 3 × 23 × 503
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√138,828 = [372; (1, 1, 2, 10, 2, 1, 1, 744)]
Period length 8 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-eight thousand eight hundred twenty-eight
- Ordinal
- 138828th
- Binary
- 100001111001001100
- Octal
- 417114
- Hexadecimal
- 0x21E4C
- Base64
- Ah5M
- One's complement
- 4,294,828,467 (32-bit)
- Scientific notation
- 1.38828 × 10⁵
- As a duration
- 138,828 s = 1 day, 14 hours, 33 minutes, 48 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρληωκηʹ
- Mayan (base 20)
- 𝋱·𝋧·𝋡·𝋨
- Chinese
- 一十三萬八千八百二十八
- Chinese (financial)
- 壹拾參萬捌仟捌佰貳拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 138828, here are decompositions:
- 7 + 138821 = 138828
- 29 + 138799 = 138828
- 31 + 138797 = 138828
- 89 + 138739 = 138828
- 97 + 138731 = 138828
- 101 + 138727 = 138828
- 149 + 138679 = 138828
- 167 + 138661 = 138828
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A1 B9 8C (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.30.76.
- Address
- 0.2.30.76
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.30.76
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 138,828 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 138828 first appears in π at position 337,289 of the decimal expansion (the 337,289ordinal-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°.