28022928 has 40 divisors (see below), whose sum is σ = 74081568. Its totient is φ = 9123072.

The previous prime is 28022927. The next prime is 28022941. The reversal of 28022928 is 82922082.

It is not an unprimeable number, because it can be changed into a prime (28022921) 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 in 7 ways as a sum of consecutive naturals, for example, 4725 + ... + 8852.

Almost surely, 2^28022928 is an apocalyptic number.

It is an amenable number.

28022928 is an abundant number, since it is smaller than the sum of its proper divisors (46058640).

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

28022928 is a wasteful number, since it uses less digits than its factorization.

28022928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13631 (or 13625 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28022928 is about 5293.6686711580. The cubic root of 28022928 is about 303.7417589933.

The spelling of 28022928 in words is "twenty-eight million, twenty-two thousand, nine hundred twenty-eight".