28256828 has 6 divisors (see below), whose sum is σ = 49449456. Its totient is φ = 14128412.

The previous prime is 28256801. The next prime is 28256843. The reversal of 28256828 is 82865282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3532100 + ... + 3532107.

It is an arithmetic number, because the mean of its divisors is an integer number (8241576).

Almost surely, 2^28256828 is an apocalyptic number.

It is an amenable number.

28256828 is a deficient number, since it is larger than the sum of its proper divisors (21192628).

28256828 is a wasteful number, since it uses less digits than its factorization.

28256828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064211 (or 7064209 counting only the distinct ones).

The product of its digits is 122880, while the sum is 41.

The square root of 28256828 is about 5315.7151917686. The cubic root of 28256828 is about 304.5845027609.

The spelling of 28256828 in words is "twenty-eight million, two hundred fifty-six thousand, eight hundred twenty-eight".