28710811 has 2 divisors, whose sum is σ = 28710812. Its totient is φ = 28710810.

The previous prime is 28710797. The next prime is 28710817. The reversal of 28710811 is 11801782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28710811 - 2¹⁵ = 28678043 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28710811.

It is not a weakly prime, because it can be changed into another prime (28710817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14355405 + 14355406.

It is an arithmetic number, because the mean of its divisors is an integer number (14355406).

Almost surely, 2^28710811 is an apocalyptic number.

28710811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28710811 is an equidigital number, since it uses as much as digits as its factorization.

28710811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 28710811 is about 5358.2470081175. The cubic root of 28710811 is about 306.2070273732.

The spelling of 28710811 in words is "twenty-eight million, seven hundred ten thousand, eight hundred eleven".