28195868 has 6 divisors (see below), whose sum is σ = 49342776. Its totient is φ = 14097932.

The previous prime is 28195819. The next prime is 28195879. The reversal of 28195868 is 86859182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3524480 + ... + 3524487.

It is an arithmetic number, because the mean of its divisors is an integer number (8223796).

Almost surely, 2^28195868 is an apocalyptic number.

It is an amenable number.

28195868 is a deficient number, since it is larger than the sum of its proper divisors (21146908).

28195868 is a wasteful number, since it uses less digits than its factorization.

28195868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7048971 (or 7048969 counting only the distinct ones).

The product of its digits is 276480, while the sum is 47.

The square root of 28195868 is about 5309.9781543807. The cubic root of 28195868 is about 304.3653127947.

The spelling of 28195868 in words is "twenty-eight million, one hundred ninety-five thousand, eight hundred sixty-eight".