28045868 has 12 divisors (see below), whose sum is σ = 49118832. Its totient is φ = 14011920.

The previous prime is 28045861. The next prime is 28045879. The reversal of 28045868 is 86854082.

It is not an unprimeable number, because it can be changed into a prime (28045861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6233 + ... + 9743.

It is an arithmetic number, because the mean of its divisors is an integer number (4093236).

Almost surely, 2^28045868 is an apocalyptic number.

It is an amenable number.

28045868 is a deficient number, since it is larger than the sum of its proper divisors (21072964).

28045868 is a wasteful number, since it uses less digits than its factorization.

28045868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5512 (or 5510 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 28045868 is about 5295.8349672172. The cubic root of 28045868 is about 303.8246189463.

The spelling of 28045868 in words is "twenty-eight million, forty-five thousand, eight hundred sixty-eight".