28527588 has 72 divisors (see below), whose sum is σ = 76658400. Its totient is φ = 8919936.

The previous prime is 28527571. The next prime is 28527599. The reversal of 28527588 is 88572582.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122320 + ... + 122552.

It is an arithmetic number, because the mean of its divisors is an integer number (1064700).

Almost surely, 2^28527588 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 28527588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38329200).

28527588 is an abundant number, since it is smaller than the sum of its proper divisors (48130812).

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

28527588 is a wasteful number, since it uses less digits than its factorization.

28527588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 436 counting only the distinct ones).

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

The square root of 28527588 is about 5341.1223539627. The cubic root of 28527588 is about 305.5542658140.

It can be divided in two parts, 2852 and 7588, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 28527588 in words is "twenty-eight million, five hundred twenty-seven thousand, five hundred eighty-eight".