28135111 has 2 divisors, whose sum is σ = 28135112. Its totient is φ = 28135110.

The previous prime is 28135087. The next prime is 28135147. The reversal of 28135111 is 11153182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28135111 - 2¹⁹ = 27610823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28105111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14067555 + 14067556.

It is an arithmetic number, because the mean of its divisors is an integer number (14067556).

Almost surely, 2^28135111 is an apocalyptic number.

28135111 is a deficient number, since it is larger than the sum of its proper divisors (1).

28135111 is an equidigital number, since it uses as much as digits as its factorization.

28135111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 22.

The square root of 28135111 is about 5304.2540474604. The cubic root of 28135111 is about 304.1465381647.

Adding to 28135111 its reverse (11153182), we get a palindrome (39288293).

The spelling of 28135111 in words is "twenty-eight million, one hundred thirty-five thousand, one hundred eleven".