28263311 has 2 divisors, whose sum is σ = 28263312. Its totient is φ = 28263310.

The previous prime is 28263293. The next prime is 28263349. The reversal of 28263311 is 11336282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28263311 - 2¹⁴ = 28246927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28263211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14131655 + 14131656.

It is an arithmetic number, because the mean of its divisors is an integer number (14131656).

Almost surely, 2^28263311 is an apocalyptic number.

28263311 is a deficient number, since it is larger than the sum of its proper divisors (1).

28263311 is an equidigital number, since it uses as much as digits as its factorization.

28263311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 28263311 is about 5316.3249524460. The cubic root of 28263311 is about 304.6077947164.

Adding to 28263311 its reverse (11336282), we get a palindrome (39599593).

The spelling of 28263311 in words is "twenty-eight million, two hundred sixty-three thousand, three hundred eleven".