28032828 has 48 divisors (see below), whose sum is σ = 70734720. Its totient is φ = 8610624.

The previous prime is 28032817. The next prime is 28032833. The reversal of 28032828 is 82823082.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6775 + ... + 10097.

It is an arithmetic number, because the mean of its divisors is an integer number (1473640).

Almost surely, 2^28032828 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28032828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35367360).

28032828 is an abundant number, since it is smaller than the sum of its proper divisors (42701892).

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

28032828 is a wasteful number, since it uses less digits than its factorization.

28032828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386 (or 3384 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28032828 is about 5294.6036678868. The cubic root of 28032828 is about 303.7775236283. Note that the first 3 decimals are identical.

The spelling of 28032828 in words is "twenty-eight million, thirty-two thousand, eight hundred twenty-eight".