31,490
31,490 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 17
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 9,413
- Recamán's sequence
- a(311,404) = 31,490
- Square (n²)
- 991,620,100
- Cube (n³)
- 31,226,116,949,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 58,752
- φ(n) — Euler's totient
- 12,144
- Sum of prime factors
- 121
Primality
Prime factorization: 2 × 5 × 47 × 67
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- thirty-one thousand four hundred ninety
- Ordinal
- 31490th
- Binary
- 111101100000010
- Octal
- 75402
- Hexadecimal
- 0x7B02
- Base64
- ewI=
- One's complement
- 34,045 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵λαυϟʹ
- Mayan (base 20)
- 𝋣·𝋲·𝋮·𝋪
- Chinese
- 三萬一千四百九十
- Chinese (financial)
- 參萬壹仟肆佰玖拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 31,490 = 1
- e — Euler's number (e)
- Digit 31,490 = 1
- φ — Golden ratio (φ)
- Digit 31,490 = 5
- √2 — Pythagoras's (√2)
- Digit 31,490 = 7
- ln 2 — Natural log of 2
- Digit 31,490 = 2
- γ — Euler-Mascheroni (γ)
- Digit 31,490 = 7
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 31490, here are decompositions:
- 13 + 31477 = 31490
- 97 + 31393 = 31490
- 103 + 31387 = 31490
- 157 + 31333 = 31490
- 163 + 31327 = 31490
- 223 + 31267 = 31490
- 241 + 31249 = 31490
- 271 + 31219 = 31490
Showing the first eight; more decompositions exist.
UTF-8 encoding: E7 AC 82 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.123.2.
- Address
- 0.0.123.2
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.123.2
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 31490 first appears in π at position 29,078 of the decimal expansion (the 29,078ordinal-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.