28545588 has 48 divisors (see below), whose sum is σ = 75418560. Its totient is φ = 9333792.

The previous prime is 28545577. The next prime is 28545607. The reversal of 28545588 is 88554582.

28545588 is a `hidden beast` number, since 28 + 5 + 45 + 588 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3231 + ... + 8217.

It is an arithmetic number, because the mean of its divisors is an integer number (1571220).

Almost surely, 2^28545588 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 28545588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37709280).

28545588 is an abundant number, since it is smaller than the sum of its proper divisors (46872972).

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

28545588 is a wasteful number, since it uses less digits than its factorization.

28545588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053 (or 5045 counting only the distinct ones).

The product of its digits is 512000, while the sum is 45.

The square root of 28545588 is about 5342.8071273442. The cubic root of 28545588 is about 305.6185173076.

The spelling of 28545588 in words is "twenty-eight million, five hundred forty-five thousand, five hundred eighty-eight".