80

Previous number

79

Next number

81

Sum of digits

8

Divisors of 80

Number of divisors

10

Sum of divisors

186

Factorization

80 = 2 × 2 × 2 × 2 × 5

Prime factors of 80

Factor Count
2 4
5 1

Square of 80

6400

Cube of 80

512000

Square root of 80

8.94427190999915922020591096952558...

Cube root of 80

4.30886938006376674081820965511724...

80th triangle number

3240

Reciprocal of 80

0.0125000000000000

Binary of 80

1010000

Number of digits of 80 in base 2

7

Octal of 80

120

Hexadecimal of 80

50

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

Quadratic residues of 80

QR80 (sequence)

80th composite number

110

Euler's totient function of 80

32

Carmichael function of 80

4

Möbius function of 80

0

Properties of 80

Properties of the number 80: 80 has 10 divisors. The divisors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, 80 and the sum of them is 186. The factorization of 80 is 2 × 2 × 2 × 2 × 5. The square and cube of 80 are 6400 and 512000 respectively. The square root and cube root of 80 are 8.94427190999915922020591096952558... and 4.30886938006376674081820965511724.... The binary, octal, hexadecimal of 80 are 1010000, 120, 50. 80 is not a prime number, not hexagonal number, not perfect number, not deficient number, not Mersenne number, not Mersenne number, Harshad number, not harmonic divisor number.

sin 80

-0.99388865392337522042254249754478...

cos 80

-0.11038724383904756354279896868320...

tan 80

9.00365494560707979587732552317902...

sin 80°

0.98480775301220802031565426659654...

cos 80°

0.17364817766693041445336120887077...

tan 80°

5.67128181961770660990396208944730...

log 80

4.38202663467388120466239342931658...

log10 80

1.90308998699194353854124983627116...

log2 80

6.32192809488736262579777758219279...

Related pairs