28890611 has 2 divisors, whose sum is σ = 28890612. Its totient is φ = 28890610.

The previous prime is 28890593. The next prime is 28890643. The reversal of 28890611 is 11609882.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28890611 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28890661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14445305 + 14445306.

It is an arithmetic number, because the mean of its divisors is an integer number (14445306).

Almost surely, 2^28890611 is an apocalyptic number.

28890611 is a deficient number, since it is larger than the sum of its proper divisors (1).

28890611 is an equidigital number, since it uses as much as digits as its factorization.

28890611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 28890611 is about 5374.9986976743. The cubic root of 28890611 is about 306.8448996737.

The spelling of 28890611 in words is "twenty-eight million, eight hundred ninety thousand, six hundred eleven".