164,720
164,720 is a composite number, even.
164,720 (one hundred sixty-four thousand seven hundred twenty) is an even 6-digit number. It is a composite number with 40 divisors, and factors as 2⁴ × 5 × 29 × 71. Its proper divisors sum to 237,040, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x28370.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 27,461
- Square (n²)
- 27,132,678,400
- Cube (n³)
- 4,469,294,786,048,000
- Divisor count
- 40
- σ(n) — sum of divisors
- 401,760
- φ(n) — Euler's totient
- 62,720
- Sum of prime factors
- 113
Primality
Prime factorization: 2 4 × 5 × 29 × 71
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√164,720 = [405; (1, 5, 1, 810)]
Period length 4 — the block in parentheses repeats forever.
Representations
- In words
- one hundred sixty-four thousand seven hundred twenty
- Ordinal
- 164720th
- Binary
- 101000001101110000
- Octal
- 501560
- Hexadecimal
- 0x28370
- Base64
- AoNw
- One's complement
- 4,294,802,575 (32-bit)
- Scientific notation
- 1.6472 × 10⁵
- As a duration
- 164,720 s = 1 day, 21 hours, 45 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆
- Greek (Milesian)
- ͵ρξδψκʹ
- Chinese
- 一十六萬四千七百二十
- Chinese (financial)
- 壹拾陸萬肆仟柒佰貳拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 164720, here are decompositions:
- 13 + 164707 = 164720
- 19 + 164701 = 164720
- 37 + 164683 = 164720
- 43 + 164677 = 164720
- 67 + 164653 = 164720
- 97 + 164623 = 164720
- 103 + 164617 = 164720
- 139 + 164581 = 164720
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A8 8D B0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.131.112.
- Address
- 0.2.131.112
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.131.112
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 164,720 and was likely granted around 1874.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 164720 first appears in π at position 106,608 of the decimal expansion (the 106,608ordinal-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°.