28868684 has 12 divisors (see below), whose sum is σ = 54406464. Its totient is φ = 13323984.

The previous prime is 28868629. The next prime is 28868687. The reversal of 28868684 is 48686882.

It is not an unprimeable number, because it can be changed into a prime (28868687) 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, 277532 + ... + 277635.

It is an arithmetic number, because the mean of its divisors is an integer number (4533872).

Almost surely, 2^28868684 is an apocalyptic number.

It is an amenable number.

28868684 is a deficient number, since it is larger than the sum of its proper divisors (25537780).

28868684 is a wasteful number, since it uses less digits than its factorization.

28868684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555184 (or 555182 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 50.

The square root of 28868684 is about 5372.9585890829. The cubic root of 28868684 is about 306.7672517141.

The spelling of 28868684 in words is "twenty-eight million, eight hundred sixty-eight thousand, six hundred eighty-four".