28873828 has 6 divisors (see below), whose sum is σ = 50529206. Its totient is φ = 14436912.

The previous prime is 28873811. The next prime is 28873849. The reversal of 28873828 is 82837882.

It can be written as a sum of positive squares in only one way, i.e., 21734244 + 7139584 = 4662^2 + 2672^2 .

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 as a sum of consecutive naturals, namely, 3609225 + ... + 3609232.

Almost surely, 2^28873828 is an apocalyptic number.

It is an amenable number.

28873828 is a deficient number, since it is larger than the sum of its proper divisors (21655378).

28873828 is a wasteful number, since it uses less digits than its factorization.

28873828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7218461 (or 7218459 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The square root of 28873828 is about 5373.4372611951. The cubic root of 28873828 is about 306.7854711917.

The spelling of 28873828 in words is "twenty-eight million, eight hundred seventy-three thousand, eight hundred twenty-eight".