28678648 has 32 divisors (see below), whose sum is σ = 55598400. Its totient is φ = 13860352.

The previous prime is 28678633. The next prime is 28678649. The reversal of 28678648 is 84687682.

It is a super-2 number, since 2×28678648² = 1644929702215808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28678649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33036 + ... + 33892.

It is an arithmetic number, because the mean of its divisors is an integer number (1737450).

Almost surely, 2^28678648 is an apocalyptic number.

It is an amenable number.

28678648 is a deficient number, since it is larger than the sum of its proper divisors (26919752).

28678648 is a wasteful number, since it uses less digits than its factorization.

28678648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 995 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 28678648 is about 5355.2449056976. The cubic root of 28678648 is about 306.0926428592.

The spelling of 28678648 in words is "twenty-eight million, six hundred seventy-eight thousand, six hundred forty-eight".