28808128 has 14 divisors (see below), whose sum is σ = 57166256. Its totient is φ = 14404032.

The previous prime is 28808099. The next prime is 28808137. The reversal of 28808128 is 82180882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225000 + ... + 225127.

It is an arithmetic number, because the mean of its divisors is an integer number (4083304).

Almost surely, 2^28808128 is an apocalyptic number.

It is an amenable number.

28808128 is a deficient number, since it is larger than the sum of its proper divisors (28358128).

28808128 is an equidigital number, since it uses as much as digits as its factorization.

28808128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450139 (or 450129 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 37.

The square root of 28808128 is about 5367.3203742650. The cubic root of 28808128 is about 306.5526061853.

The spelling of 28808128 in words is "twenty-eight million, eight hundred eight thousand, one hundred twenty-eight".