28260311 has 2 divisors, whose sum is σ = 28260312. Its totient is φ = 28260310.

The previous prime is 28260269. The next prime is 28260317. The reversal of 28260311 is 11306282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28260311 - 2⁶ = 28260247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28260317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14130155 + 14130156.

It is an arithmetic number, because the mean of its divisors is an integer number (14130156).

Almost surely, 2^28260311 is an apocalyptic number.

28260311 is a deficient number, since it is larger than the sum of its proper divisors (1).

28260311 is an equidigital number, since it uses as much as digits as its factorization.

28260311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 28260311 is about 5316.0427951626. The cubic root of 28260311 is about 304.5970168364.

Adding to 28260311 its reverse (11306282), we get a palindrome (39566593).

The spelling of 28260311 in words is "twenty-eight million, two hundred sixty thousand, three hundred eleven".