28532111 has 2 divisors, whose sum is σ = 28532112. Its totient is φ = 28532110.

The previous prime is 28532107. The next prime is 28532191. The reversal of 28532111 is 11123582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28532111 - 2² = 28532107 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28532191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14266055 + 14266056.

It is an arithmetic number, because the mean of its divisors is an integer number (14266056).

Almost surely, 2^28532111 is an apocalyptic number.

28532111 is a deficient number, since it is larger than the sum of its proper divisors (1).

28532111 is an equidigital number, since it uses as much as digits as its factorization.

28532111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 23.

The square root of 28532111 is about 5341.5457500615. The cubic root of 28532111 is about 305.5704133283.

Adding to 28532111 its reverse (11123582), we get a palindrome (39655693).

The spelling of 28532111 in words is "twenty-eight million, five hundred thirty-two thousand, one hundred eleven".