28907011 has 16 divisors (see below), whose sum is σ = 34214400. Its totient is φ = 24407880.

The previous prime is 28906981. The next prime is 28907017. The reversal of 28907011 is 11070982.

It is not a de Polignac number, because 28907011 - 2¹¹ = 28904963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28907017) 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 in 15 ways as a sum of consecutive naturals, for example, 23760 + ... + 24946.

It is an arithmetic number, because the mean of its divisors is an integer number (2138400).

Almost surely, 2^28907011 is an apocalyptic number.

28907011 is a deficient number, since it is larger than the sum of its proper divisors (5307389).

28907011 is an equidigital number, since it uses as much as digits as its factorization.

28907011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 28907011 is about 5376.5240629983. The cubic root of 28907011 is about 306.9029497262.

Adding to 28907011 its reverse (11070982), we get a palindrome (39977993).

The spelling of 28907011 in words is "twenty-eight million, nine hundred seven thousand, eleven".