28578528 has 192 divisors, whose sum is σ = 94832640. Its totient is φ = 8294400.

The previous prime is 28578521. The next prime is 28578533. The reversal of 28578528 is 82587582.

28578528 is a `hidden beast` number, since 28 + 578 + 52 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28578521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294576 + ... + 294672.

It is an arithmetic number, because the mean of its divisors is an integer number (493920).

Almost surely, 2^28578528 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 28578528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47416320).

28578528 is an abundant number, since it is smaller than the sum of its proper divisors (66254112).

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

28578528 is a wasteful number, since it uses less digits than its factorization.

28578528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 144 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 28578528 is about 5345.8888877342. Note that the first 5 decimals coincide. The cubic root of 28578528 is about 305.7360276349.

The spelling of 28578528 in words is "twenty-eight million, five hundred seventy-eight thousand, five hundred twenty-eight".