4

Previous number

3

Next number

5

Sum of digits

4

Divisors of 4

Number of divisors

3

Sum of divisors

7

Factorization

4 = 2 × 2

Prime factors of 4

Factor Count
2 2

Square of 4

16

Cube of 4

64

Square root of 4

2

Cube root of 4

1.58740105196819936139718265621923...

4th triangle number

10

Reciprocal of 4

0.2500000000000000

Binary of 4

100

Number of digits of 4 in base 2

3

Octal of 4

4

Hexadecimal of 4

4

Prime number No
Hexagonal number No
Perfect number No
Deficient number Yes
Abundant number No
Mersenne number No
Harshad number Yes
Harmonic divisor number No

Quadratic residues of 4

QR4 (sequence)

4th composite number

9

Euler's totient function of 4

2

Carmichael function of 4

2

Möbius function of 4

0

Properties of 4

Properties of the number 4: 4 has 3 divisors. The divisors of 4 are 1, 2, 4 and the sum of them is 7. The factorization of 4 is 2 × 2. The square and cube of 4 are 16 and 64 respectively. The square root and cube root of 4 are 2 and 1.58740105196819936139718265621923.... The binary, octal, hexadecimal of 4 are 100, 4, 4. 4 is not a prime number, not hexagonal number, not perfect number, deficient number, not Mersenne number, not Mersenne number, Harshad number, not harmonic divisor number.

sin 4

-0.75680249530792820245039820292732...

cos 4

-0.65364362086361194048578227011603...

tan 4

1.15782128234957748524891485430999...

sin 4°

0.06975647374412530243859009715379...

cos 4°

0.99756405025982419765284703316865...

tan 4°

0.06992681194351041407131219784787...

log 4

1.38629436111989057245352796599036...

log10 4

0.60205999132796239603493404501933...

log2 4

2.00000000000000000000000000000000...

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