28695811 has 2 divisors, whose sum is σ = 28695812. Its totient is φ = 28695810.

The previous prime is 28695809. The next prime is 28695829. The reversal of 28695811 is 11859682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28695811 - 2¹ = 28695809 is a prime.

Together with 28695809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28695851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14347905 + 14347906.

It is an arithmetic number, because the mean of its divisors is an integer number (14347906).

Almost surely, 2^28695811 is an apocalyptic number.

28695811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28695811 is an equidigital number, since it uses as much as digits as its factorization.

28695811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 40.

The square root of 28695811 is about 5356.8471137414. The cubic root of 28695811 is about 306.1536919991.

The spelling of 28695811 in words is "twenty-eight million, six hundred ninety-five thousand, eight hundred eleven".