28786328 has 32 divisors (see below), whose sum is σ = 56332800. Its totient is φ = 13773312.

The previous prime is 28786319. The next prime is 28786343. The reversal of 28786328 is 82368782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28976 + ... + 29952.

It is an arithmetic number, because the mean of its divisors is an integer number (1760400).

Almost surely, 2^28786328 is an apocalyptic number.

It is an amenable number.

28786328 is a deficient number, since it is larger than the sum of its proper divisors (27546472).

28786328 is a wasteful number, since it uses less digits than its factorization.

28786328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1135 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 28786328 is about 5365.2891813955. The cubic root of 28786328 is about 306.4752607311.

The spelling of 28786328 in words is "twenty-eight million, seven hundred eighty-six thousand, three hundred twenty-eight".