28726856 has 16 divisors (see below), whose sum is σ = 53930940. Its totient is φ = 14345280.

The previous prime is 28726847. The next prime is 28726861. The reversal of 28726856 is 65862782.

It can be written as a sum of positive squares in 2 ways, for example, as 25664356 + 3062500 = 5066^2 + 1750^2 .

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, 6410 + ... + 9926.

Almost surely, 2^28726856 is an apocalyptic number.

It is an amenable number.

28726856 is a deficient number, since it is larger than the sum of its proper divisors (25204084).

28726856 is a wasteful number, since it uses less digits than its factorization.

28726856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544 (or 4540 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 28726856 is about 5359.7440237384. The cubic root of 28726856 is about 306.2640578859.

The spelling of 28726856 in words is "twenty-eight million, seven hundred twenty-six thousand, eight hundred fifty-six".