28425328 has 20 divisors (see below), whose sum is σ = 55187440. Its totient is φ = 14183424.

The previous prime is 28425323. The next prime is 28425337. The reversal of 28425328 is 82352482.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28425293 and 28425302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28425323) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 7693 + ... + 10771.

It is an arithmetic number, because the mean of its divisors is an integer number (2759372).

Almost surely, 2^28425328 is an apocalyptic number.

It is an amenable number.

28425328 is a deficient number, since it is larger than the sum of its proper divisors (26762112).

28425328 is a wasteful number, since it uses less digits than its factorization.

28425328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664 (or 3658 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 28425328 is about 5331.5408654534. The cubic root of 28425328 is about 305.1887320655.

The spelling of 28425328 in words is "twenty-eight million, four hundred twenty-five thousand, three hundred twenty-eight".