Check the properties of a positive integer to enter the number in the search box. If you input two numbers separated by a space, the properties of the pair like GCD are shown. If you separate two numbers by a comma, the sequences containing those numbers are listed.
28 = 2 × 2 × 7
5.29150262212918143234219314763322...
3.03658897187566223507815266202670...
0.0357142857142857
11100
5
34
1c
| Prime number | No |
| Hexagonal number | Yes |
| Perfect number | No |
| Deficient number | No |
| Abundant number | No |
| Mersenne number | No |
| Harshad number | No |
| Harmonic divisor number | Yes |
QR28 (sequence)
0
Properties of the number 28: 28 has 6 divisors. The divisors of 28 are 1, 2, 4, 7, 14, 28 and the sum of them is 56. The factorization of 28 is 2 × 2 × 7. The square and cube of 28 are 784 and 21952 respectively. The square root and cube root of 28 are 5.29150262212918143234219314763322... and 3.03658897187566223507815266202670.... The binary, octal, hexadecimal of 28 are 11100, 34, 1c. 28 is not a prime number, hexagonal number, not perfect number, not deficient number, not Mersenne number, not Mersenne number, not Harshad number, harmonic divisor number.
0.27090578830786904429572814478888...
-0.96260586631356659381708595901728...
-0.28142960456426524551432066800771...
0.46947156278589080580232462125423...
0.88294759285892698841280434862711...
0.53170943166147877079197314742487...
3.33220451017520380432301863038447...
1.44715803134221920878133005317068...
4.80735492205760372996792284538969...