28669111 has 2 divisors, whose sum is σ = 28669112. Its totient is φ = 28669110.

The previous prime is 28669097. The next prime is 28669169. The reversal of 28669111 is 11196682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28669111 - 2²¹ = 26571959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28669211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334555 + 14334556.

It is an arithmetic number, because the mean of its divisors is an integer number (14334556).

Almost surely, 2^28669111 is an apocalyptic number.

28669111 is a deficient number, since it is larger than the sum of its proper divisors (1).

28669111 is an equidigital number, since it uses as much as digits as its factorization.

28669111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 28669111 is about 5354.3543961901. The cubic root of 28669111 is about 306.0587090282.

The spelling of 28669111 in words is "twenty-eight million, six hundred sixty-nine thousand, one hundred eleven".