28430566 has 16 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 13917448.

The previous prime is 28430561. The next prime is 28430569. The reversal of 28430566 is 66503482.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28430561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56271 + ... + 56773.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^28430566 is an apocalyptic number.

28430566 is a deficient number, since it is larger than the sum of its proper divisors (15115034).

28430566 is a wasteful number, since it uses less digits than its factorization.

28430566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 28430566 is about 5332.0320704212. The cubic root of 28430566 is about 305.2074768553.

The spelling of 28430566 in words is "twenty-eight million, four hundred thirty thousand, five hundred sixty-six".