28393684 has 24 divisors (see below), whose sum is σ = 56564928. Its totient is φ = 12344640.

The previous prime is 28393667. The next prime is 28393693. The reversal of 28393684 is 48639382.

It is a self number, because there is not a number n which added to its sum of digits gives 28393684.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13017 + ... + 15040.

It is an arithmetic number, because the mean of its divisors is an integer number (2356872).

Almost surely, 2^28393684 is an apocalyptic number.

It is an amenable number.

28393684 is a deficient number, since it is larger than the sum of its proper divisors (28171244).

28393684 is a wasteful number, since it uses less digits than its factorization.

28393684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28095 (or 28093 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 28393684 is about 5328.5724166985. The cubic root of 28393684 is about 305.0754413399.

The spelling of 28393684 in words is "twenty-eight million, three hundred ninety-three thousand, six hundred eighty-four".