28678656 has 40 divisors (see below), whose sum is σ = 76405824. Its totient is φ = 9559040.

The previous prime is 28678649. The next prime is 28678667. The reversal of 28678656 is 65687682.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7800 + ... + 10871.

Almost surely, 2^28678656 is an apocalyptic number.

It is an amenable number.

28678656 is an abundant number, since it is smaller than the sum of its proper divisors (47727168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28678656 is an equidigital number, since it uses as much as digits as its factorization.

28678656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18692 (or 18676 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 28678656 is about 5355.2456526288. The cubic root of 28678656 is about 306.0926713210.

The spelling of 28678656 in words is "twenty-eight million, six hundred seventy-eight thousand, six hundred fifty-six".