28363828 has 6 divisors (see below), whose sum is σ = 49636706. Its totient is φ = 14181912.

The previous prime is 28363823. The next prime is 28363849. The reversal of 28363828 is 82836382.

It can be written as a sum of positive squares in only one way, i.e., 18766224 + 9597604 = 4332^2 + 3098^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28363823) by changing a digit.

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, 3545475 + ... + 3545482.

Almost surely, 2^28363828 is an apocalyptic number.

It is an amenable number.

28363828 is a deficient number, since it is larger than the sum of its proper divisors (21272878).

28363828 is a wasteful number, since it uses less digits than its factorization.

28363828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7090961 (or 7090959 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 28363828 is about 5325.7701790445. The cubic root of 28363828 is about 304.9684747493.

The spelling of 28363828 in words is "twenty-eight million, three hundred sixty-three thousand, eight hundred twenty-eight".