28015684 has 12 divisors (see below), whose sum is σ = 49158144. Its totient is φ = 13970504.

The previous prime is 28015681. The next prime is 28015693. The reversal of 28015684 is 48651082.

It is not an unprimeable number, because it can be changed into a prime (28015681) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 7612 + ... + 10675.

It is an arithmetic number, because the mean of its divisors is an integer number (4096512).

Almost surely, 2^28015684 is an apocalyptic number.

It is an amenable number.

28015684 is a deficient number, since it is larger than the sum of its proper divisors (21142460).

28015684 is a wasteful number, since it uses less digits than its factorization.

28015684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18674 (or 18672 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 28015684 is about 5292.9844133532. The cubic root of 28015684 is about 303.7155840587.

The spelling of 28015684 in words is "twenty-eight million, fifteen thousand, six hundred eighty-four".