28103668 has 12 divisors (see below), whose sum is σ = 50877540. Its totient is φ = 13567232.

The previous prime is 28103633. The next prime is 28103693. The reversal of 28103668 is 86630182.

It can be written as a sum of positive squares in 2 ways, for example, as 5560164 + 22543504 = 2358^2 + 4748^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121021 + ... + 121252.

It is an arithmetic number, because the mean of its divisors is an integer number (4239795).

Almost surely, 2^28103668 is an apocalyptic number.

It is an amenable number.

28103668 is a deficient number, since it is larger than the sum of its proper divisors (22773872).

28103668 is a wasteful number, since it uses less digits than its factorization.

28103668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242306 (or 242304 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28103668 is about 5301.2892771476. The cubic root of 28103668 is about 304.0331940901.

The spelling of 28103668 in words is "twenty-eight million, one hundred three thousand, six hundred sixty-eight".