28322011 has 2 divisors, whose sum is σ = 28322012. Its totient is φ = 28322010.

The previous prime is 28321999. The next prime is 28322071. The reversal of 28322011 is 11022382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28322011 - 2⁹ = 28321499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28322011.

It is not a weakly prime, because it can be changed into another prime (28322071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14161005 + 14161006.

It is an arithmetic number, because the mean of its divisors is an integer number (14161006).

Almost surely, 2^28322011 is an apocalyptic number.

28322011 is a deficient number, since it is larger than the sum of its proper divisors (1).

28322011 is an equidigital number, since it uses as much as digits as its factorization.

28322011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 28322011 is about 5321.8428199262. The cubic root of 28322011 is about 304.8185286153.

Adding to 28322011 its reverse (11022382), we get a palindrome (39344393).

The spelling of 28322011 in words is "twenty-eight million, three hundred twenty-two thousand, eleven".