28867828 has 24 divisors (see below), whose sum is σ = 56155680. Its totient is φ = 12873120.

The previous prime is 28867801. The next prime is 28867831. The reversal of 28867828 is 82876882.

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, 3858 + ... + 8521.

It is an arithmetic number, because the mean of its divisors is an integer number (2339820).

Almost surely, 2^28867828 is an apocalyptic number.

It is an amenable number.

28867828 is a deficient number, since it is larger than the sum of its proper divisors (27287852).

28867828 is a wasteful number, since it uses less digits than its factorization.

28867828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12447 (or 12445 counting only the distinct ones).

The product of its digits is 688128, while the sum is 49.

The square root of 28867828 is about 5372.8789303315. The cubic root of 28867828 is about 306.7642196470.

The spelling of 28867828 in words is "twenty-eight million, eight hundred sixty-seven thousand, eight hundred twenty-eight".