Live analysis

42,990

42,990 is a composite number, even.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

42,990 (forty-two thousand nine hundred ninety) is an even 5-digit number. It is a composite number with 16 divisors, and factors as 2 × 3 × 5 × 1,433. Its proper divisors sum to 60,258, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xA7EE.

Abundant Number Arithmetic Number Cube-Free Odious Number Pernicious Number Recamán's Sequence Self Number Semiperfect Number Squarefree

Interestingness

★ ★ ★ ★ ☆

6 notable facts · grade B

42,978 42,979 42,980 42,981 42,982 42,983 42,984 42,985 42,986 42,987 42,988 42,989 42,990 42,991 42,992 42,993 42,994 42,995 42,996 42,997 42,998 42,999 43,000 43,001 43,002

less more

Properties

Parity: Even
Digit count: 5
Digit sum: 24
Digit product: 0
Digital root: 6
Palindrome: No
Bit width: 16 bits
Reversed: 9,924
Recamán's sequence: a(72,612) = 42,990
Square (n²): 1,848,140,100
Cube (n³): 79,451,542,899,000
Divisor count: 16
σ(n) — sum of divisors: 103,248
φ(n) — Euler's totient: 11,456
Sum of prime factors: 1,443

Primality

Prime factorization: 2 × 3 × 5 × 1433

Nearest primes: 42,989 (−1) · 43,003 (+13)

Divisors & multiples

All divisors (16)

1 · 2 · 3 · 5 · 6 · 10 · 15 · 30 · 1433 · 2866 · 4299 · 7165 · 8598 · 14330 · 21495 (half) · 42990

Aliquot sum (sum of proper divisors): 60,258

Factor pairs (a × b = 42,990)

1 × 42990

2 × 21495

3 × 14330

5 × 8598

6 × 7165

10 × 4299

15 × 2866

30 × 1433

First multiples

42,990 · 85,980 (double) · 128,970 · 171,960 · 214,950 · 257,940 · 300,930 · 343,920 · 386,910 · 429,900

Sums & aliquot sequence

As consecutive integers: 14,329 + 14,330 + 14,331 10,746 + 10,747 + 10,748 + 10,749 8,596 + 8,597 + 8,598 + 8,599 + 8,600 3,577 + 3,578 + … + 3,588

Aliquot sequence: 42,990 → 60,258 → 73,806 → 73,818 → 90,342 → 140,058 → 174,438 → 238,338 → 278,100 → 624,620 → 687,124 → 521,580 → 939,012 → 1,381,404 → 1,841,900 → 2,215,132 → 1,700,444 — unresolved within range

Continued fraction of √n

√42,990 = [207; (2, 1, 15, 3, 1, 1, 5, 2, 3, 1, 1, 1, 4, 1, 26, 1, 4, 1, 1, 1, 3, 2, 5, 1, …)]

Period length 30 — the block in parentheses repeats forever.

Representations

In words: forty-two thousand nine hundred ninety
Ordinal: 42990th
Binary: 1010011111101110
Octal: 123756
Hexadecimal: 0xA7EE
Base64: p+4=
One's complement: 22,545 (16-bit)
Scientific notation: 4.299 × 10⁴
As a duration: 42,990 s = 11 hours, 56 minutes, 30 seconds

In other bases

ternary (3) 2011222020

quaternary (4) 22133232

quinary (5) 2333430

senary (6) 531010

septenary (7) 236223

nonary (9) 64866

undecimal (11) 2a332

duodecimal (12) 20a66

tridecimal (13) 1674c

tetradecimal (14) 1194a

pentadecimal (15) cb10

As an angle

42,990° = 119 × 360° + 150°

150° ≈ 2.618 rad

Compass bearing: SSE (south-southeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋
Egyptian hieroglyphic: 𓂍𓂍𓂍𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
Greek (Milesian): ͵μβϡϟʹ
Mayan (base 20): 𝋥·𝋧·𝋩·𝋪
Chinese: 四萬二千九百九十
Chinese (financial): 肆萬貳仟玖佰玖拾

In other modern scripts

Eastern Arabic ٤٢٩٩٠ Devanagari ४२९९० Bengali ৪২৯৯০ Tamil ௪௨௯௯௦ Thai ๔๒๙๙๐ Tibetan ༤༢༩༩༠ Khmer ៤២៩៩០ Lao ໔໒໙໙໐ Burmese ၄၂၉၉၀

Digit at this position in famous constants

π — Pi (π): Digit 42,990 = 8
e — Euler's number (e): Digit 42,990 = 5
φ — Golden ratio (φ): Digit 42,990 = 0
√2 — Pythagoras's (√2): Digit 42,990 = 7
ln 2 — Natural log of 2: Digit 42,990 = 7
γ — Euler-Mascheroni (γ): Digit 42,990 = 6

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 42990, here are decompositions:

11 + 42979 = 42990
23 + 42967 = 42990
29 + 42961 = 42990
37 + 42953 = 42990
47 + 42943 = 42990
53 + 42937 = 42990
61 + 42929 = 42990
67 + 42923 = 42990

Showing the first eight; more decompositions exist.

Hex color

#00A7EE

RGB(0, 167, 238)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.167.238.

Address: 0.0.167.238
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.167.238

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Position in π

The digit sequence 42990 first appears in π at position 104,975 of the decimal expansion (the 104,975ordinal-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.

Look up 42990 on Pi Search ↗