28323011 has 2 divisors, whose sum is σ = 28323012. Its totient is φ = 28323010.

The previous prime is 28322981. The next prime is 28323047. The reversal of 28323011 is 11032382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28323011 - 2¹⁸ = 28060867 is a prime.

It is a super-2 number, since 2×28323011² = 1604385904212242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28323811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14161505 + 14161506.

It is an arithmetic number, because the mean of its divisors is an integer number (14161506).

Almost surely, 2^28323011 is an apocalyptic number.

28323011 is a deficient number, since it is larger than the sum of its proper divisors (1).

28323011 is an equidigital number, since it uses as much as digits as its factorization.

28323011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 28323011 is about 5321.9367715147. The cubic root of 28323011 is about 304.8221161071.

Adding to 28323011 its reverse (11032382), we get a palindrome (39355393).

The spelling of 28323011 in words is "twenty-eight million, three hundred twenty-three thousand, eleven".