28528324 has 12 divisors (see below), whose sum is σ = 54463248. Its totient is φ = 12967400.

The previous prime is 28528309. The next prime is 28528351. The reversal of 28528324 is 42382582.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28528324.

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 in 3 ways as a sum of consecutive naturals, for example, 324142 + ... + 324229.

It is an arithmetic number, because the mean of its divisors is an integer number (4538604).

Almost surely, 2^28528324 is an apocalyptic number.

It is an amenable number.

28528324 is a deficient number, since it is larger than the sum of its proper divisors (25934924).

28528324 is a wasteful number, since it uses less digits than its factorization.

28528324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648386 (or 648384 counting only the distinct ones).

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

The square root of 28528324 is about 5341.1912528948. The cubic root of 28528324 is about 305.5568935160.

The spelling of 28528324 in words is "twenty-eight million, five hundred twenty-eight thousand, three hundred twenty-four".