28024128 has 84 divisors (see below), whose sum is σ = 87648288. Its totient is φ = 8490240.

The previous prime is 28024127. The next prime is 28024147. The reversal of 28024128 is 82142082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28024123) 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, 4125 + ... + 8547.

It is an arithmetic number, because the mean of its divisors is an integer number (1043432).

Almost surely, 2^28024128 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 28024128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43824144).

28024128 is an abundant number, since it is smaller than the sum of its proper divisors (59624160).

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

28024128 is a wasteful number, since it uses less digits than its factorization.

28024128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4452 (or 4439 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28024128 is about 5293.7820128902. The cubic root of 28024128 is about 303.7460945492.

The spelling of 28024128 in words is "twenty-eight million, twenty-four thousand, one hundred twenty-eight".