28675688 has 8 divisors (see below), whose sum is σ = 53766930. Its totient is φ = 14337840.

The previous prime is 28675663. The next prime is 28675697. The reversal of 28675688 is 88657682.

It can be written as a sum of positive squares in only one way, i.e., 23020804 + 5654884 = 4798^2 + 2378^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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, 1792223 + ... + 1792238.

Almost surely, 2^28675688 is an apocalyptic number.

It is an amenable number.

28675688 is a deficient number, since it is larger than the sum of its proper divisors (25091242).

28675688 is a wasteful number, since it uses less digits than its factorization.

28675688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584467 (or 3584463 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 50.

The square root of 28675688 is about 5354.9685339879. The cubic root of 28675688 is about 306.0821116166.

The spelling of 28675688 in words is "twenty-eight million, six hundred seventy-five thousand, six hundred eighty-eight".