28875328 has 14 divisors (see below), whose sum is σ = 57299606. Its totient is φ = 14437632.

The previous prime is 28875313. The next prime is 28875331. The reversal of 28875328 is 82357882.

It can be written as a sum of positive squares in only one way, i.e., 24681024 + 4194304 = 4968^2 + 2048^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225525 + ... + 225652.

It is an arithmetic number, because the mean of its divisors is an integer number (4092829).

Almost surely, 2^28875328 is an apocalyptic number.

It is an amenable number.

28875328 is a deficient number, since it is larger than the sum of its proper divisors (28424278).

28875328 is an equidigital number, since it uses as much as digits as its factorization.

28875328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451189 (or 451179 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 28875328 is about 5373.5768348466. The cubic root of 28875328 is about 306.7907836179.

The spelling of 28875328 in words is "twenty-eight million, eight hundred seventy-five thousand, three hundred twenty-eight".