28350011 has 4 divisors (see below), whose sum is σ = 28362792. Its totient is φ = 28337232.

The previous prime is 28349989. The next prime is 28350013. The reversal of 28350011 is 11005382.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11005382 = 2 ⋅5502691.

It is a cyclic number.

It is not a de Polignac number, because 28350011 - 2¹⁰ = 28348987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28350013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2105 + ... + 7818.

It is an arithmetic number, because the mean of its divisors is an integer number (7090698).

Almost surely, 2^28350011 is an apocalyptic number.

28350011 is a deficient number, since it is larger than the sum of its proper divisors (12781).

28350011 is an equidigital number, since it uses as much as digits as its factorization.

28350011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12780.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 28350011 is about 5324.4728377559. The cubic root of 28350011 is about 304.9189464813.

Adding to 28350011 its reverse (11005382), we get a palindrome (39355393).

The spelling of 28350011 in words is "twenty-eight million, three hundred fifty thousand, eleven".