28398668 has 12 divisors (see below), whose sum is σ = 49796712. Its totient is φ = 14171040.

The previous prime is 28398661. The next prime is 28398677. The reversal of 28398668 is 86689382.

It is not an unprimeable number, because it can be changed into a prime (28398661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4730 + ... + 8897.

It is an arithmetic number, because the mean of its divisors is an integer number (4149726).

Almost surely, 2^28398668 is an apocalyptic number.

It is an amenable number.

28398668 is a deficient number, since it is larger than the sum of its proper divisors (21398044).

28398668 is a wasteful number, since it uses less digits than its factorization.

28398668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14152 (or 14150 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The square root of 28398668 is about 5329.0400636512. The cubic root of 28398668 is about 305.0932904626.

The spelling of 28398668 in words is "twenty-eight million, three hundred ninety-eight thousand, six hundred sixty-eight".