28664830 has 32 divisors (see below), whose sum is σ = 53498880. Its totient is φ = 11051040.

The previous prime is 28664821. The next prime is 28664833. The reversal of 28664830 is 3846682.

It is a self number, because there is not a number n which added to its sum of digits gives 28664830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28664833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32941 + ... + 33799.

It is an arithmetic number, because the mean of its divisors is an integer number (1671840).

Almost surely, 2^28664830 is an apocalyptic number.

28664830 is a deficient number, since it is larger than the sum of its proper divisors (24834050).

28664830 is a wasteful number, since it uses less digits than its factorization.

28664830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 28664830 is about 5353.9546131808. The cubic root of 28664830 is about 306.0434742510.

The spelling of 28664830 in words is "twenty-eight million, six hundred sixty-four thousand, eight hundred thirty".