28408328 has 16 divisors (see below), whose sum is σ = 57363180. Its totient is φ = 13111488.

The previous prime is 28408319. The next prime is 28408333. The reversal of 28408328 is 82380482.

It can be written as a sum of positive squares in 2 ways, for example, as 22829284 + 5579044 = 4778^2 + 2362^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136475 + ... + 136682.

Almost surely, 2^28408328 is an apocalyptic number.

It is an amenable number.

28408328 is an abundant number, since it is smaller than the sum of its proper divisors (28954852).

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

28408328 is a wasteful number, since it uses less digits than its factorization.

28408328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273176 (or 273172 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 28408328 is about 5329.9463411933. The cubic root of 28408328 is about 305.1278797266.

The spelling of 28408328 in words is "twenty-eight million, four hundred eight thousand, three hundred twenty-eight".