28015868 has 12 divisors (see below), whose sum is σ = 49203000. Its totient is φ = 13957872.

The previous prime is 28015843. The next prime is 28015907. The reversal of 28015868 is 86851082.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11243 + ... + 13506.

It is an arithmetic number, because the mean of its divisors is an integer number (4100250).

Almost surely, 2^28015868 is an apocalyptic number.

It is an amenable number.

28015868 is a deficient number, since it is larger than the sum of its proper divisors (21187132).

28015868 is a wasteful number, since it uses less digits than its factorization.

28015868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25036 (or 25034 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 28015868 is about 5293.0017948230. The cubic root of 28015868 is about 303.7162489666.

The spelling of 28015868 in words is "twenty-eight million, fifteen thousand, eight hundred sixty-eight".