28201584 has 20 divisors (see below), whose sum is σ = 72854216. Its totient is φ = 9400512.

The previous prime is 28201561. The next prime is 28201597. The reversal of 28201584 is 48510282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293719 + ... + 293814.

Almost surely, 2^28201584 is an apocalyptic number.

28201584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28201584 is an abundant number, since it is smaller than the sum of its proper divisors (44652632).

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

28201584 is a wasteful number, since it uses less digits than its factorization.

28201584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587544 (or 587538 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 28201584 is about 5310.5163590747. The cubic root of 28201584 is about 304.3858788646.

The spelling of 28201584 in words is "twenty-eight million, two hundred one thousand, five hundred eighty-four".