28228584 has 16 divisors (see below), whose sum is σ = 70571520. Its totient is φ = 9409520.

The previous prime is 28228573. The next prime is 28228621. The reversal of 28228584 is 48582282.

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, 588072 + ... + 588119.

It is an arithmetic number, because the mean of its divisors is an integer number (4410720).

Almost surely, 2^28228584 is an apocalyptic number.

28228584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28228584 is an abundant number, since it is smaller than the sum of its proper divisors (42342936).

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

28228584 is a wasteful number, since it uses less digits than its factorization.

28228584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176200 (or 1176196 counting only the distinct ones).

The product of its digits is 81920, while the sum is 39.

The square root of 28228584 is about 5313.0578765905. The cubic root of 28228584 is about 304.4829868542.

The spelling of 28228584 in words is "twenty-eight million, two hundred twenty-eight thousand, five hundred eighty-four".