28030866 has 16 divisors (see below), whose sum is σ = 56640864. Its totient is φ = 9247104.

The previous prime is 28030861. The next prime is 28030889. The reversal of 28030866 is 66803082.

It is not an unprimeable number, because it can be changed into a prime (28030861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23500 + ... + 24663.

It is an arithmetic number, because the mean of its divisors is an integer number (3540054).

Almost surely, 2^28030866 is an apocalyptic number.

28030866 is an abundant number, since it is smaller than the sum of its proper divisors (28609998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28030866 is a wasteful number, since it uses less digits than its factorization.

28030866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48265.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 28030866 is about 5294.4183816544. The cubic root of 28030866 is about 303.7704363970.

The spelling of 28030866 in words is "twenty-eight million, thirty thousand, eight hundred sixty-six".