28830889 has 2 divisors, whose sum is σ = 28830890. Its totient is φ = 28830888.

The previous prime is 28830869. The next prime is 28830911. The reversal of 28830889 is 98803882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 10272025 = 4308^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 28830889 - 2⁷ = 28830761 is a prime.

It is not a weakly prime, because it can be changed into another prime (28830869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14415444 + 14415445.

It is an arithmetic number, because the mean of its divisors is an integer number (14415445).

Almost surely, 2^28830889 is an apocalyptic number.

It is an amenable number.

28830889 is a deficient number, since it is larger than the sum of its proper divisors (1).

28830889 is an equidigital number, since it uses as much as digits as its factorization.

28830889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 28830889 is about 5369.4402874043. The cubic root of 28830889 is about 306.6333195991.

The spelling of 28830889 in words is "twenty-eight million, eight hundred thirty thousand, eight hundred eighty-nine".