28330818 has 16 divisors (see below), whose sum is σ = 57192480. Its totient is φ = 9355136.

The previous prime is 28330793. The next prime is 28330829. The reversal of 28330818 is 81803382.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21423 + ... + 22706.

It is an arithmetic number, because the mean of its divisors is an integer number (3574530).

Almost surely, 2^28330818 is an apocalyptic number.

28330818 is an abundant number, since it is smaller than the sum of its proper divisors (28861662).

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

28330818 is a wasteful number, since it uses less digits than its factorization.

28330818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44241.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28330818 is about 5322.6701945546. The cubic root of 28330818 is about 304.8501207525.

The spelling of 28330818 in words is "twenty-eight million, three hundred thirty thousand, eight hundred eighteen".