28758528 has 90 divisors (see below), whose sum is σ = 84062979. Its totient is φ = 9464832.

The previous prime is 28758523. The next prime is 28758551. The reversal of 28758528 is 82585782.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 14379264 + 14379264 = 3792^2 + 3792^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3792.

It is not an unprimeable number, because it can be changed into a prime (28758523) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 363993 + ... + 364071.

Almost surely, 2^28758528 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 28758528

28758528 is an abundant number, since it is smaller than the sum of its proper divisors (55304451).

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

28758528 is an frugal number, since it uses more digits than its factorization.

28758528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 84 counting only the distinct ones).

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

The square root of 28758528 is about 5362.6978285188. The cubic root of 28758528 is about 306.3765708668.

The spelling of 28758528 in words is "twenty-eight million, seven hundred fifty-eight thousand, five hundred twenty-eight".