28828384 has 72 divisors (see below), whose sum is σ = 64382472. Its totient is φ = 12629760.

The previous prime is 28828367. The next prime is 28828399. The reversal of 28828384 is 48382882.

It is a self number, because there is not a number n which added to its sum of digits gives 28828384.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219999 + ... + 220129.

It is an arithmetic number, because the mean of its divisors is an integer number (894201).

Almost surely, 2^28828384 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 28828384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32191236).

28828384 is an abundant number, since it is smaller than the sum of its proper divisors (35554088).

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

28828384 is a wasteful number, since it uses less digits than its factorization.

28828384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 169 counting only the distinct ones).

The product of its digits is 196608, while the sum is 43.

The square root of 28828384 is about 5369.2070178007. The cubic root of 28828384 is about 306.6244386299.

The spelling of 28828384 in words is "twenty-eight million, eight hundred twenty-eight thousand, three hundred eighty-four".