28864528 has 60 divisors (see below), whose sum is σ = 70990992. Its totient is φ = 11242560.

The previous prime is 28864523. The next prime is 28864543. The reversal of 28864528 is 82546882.

It is not an unprimeable number, because it can be changed into a prime (28864523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6951 + ... + 10297.

Almost surely, 2^28864528 is an apocalyptic number.

28864528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28864528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35495496).

28864528 is an abundant number, since it is smaller than the sum of its proper divisors (42126464).

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

28864528 is a wasteful number, since it uses less digits than its factorization.

28864528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380 (or 3367 counting only the distinct ones).

The product of its digits is 245760, while the sum is 43.

The square root of 28864528 is about 5372.5718236241. The cubic root of 28864528 is about 306.7525300422.

It can be divided in two parts, 28864 and 528, that added together give a palindrome (29392).

The spelling of 28864528 in words is "twenty-eight million, eight hundred sixty-four thousand, five hundred twenty-eight".