28028924 has 36 divisors (see below), whose sum is σ = 61624752. Its totient is φ = 10919040.

The previous prime is 28028921. The next prime is 28028969. The reversal of 28028924 is 42982082.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28028921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 749 + ... + 7524.

Almost surely, 2^28028924 is an apocalyptic number.

It is an amenable number.

28028924 is an abundant number, since it is smaller than the sum of its proper divisors (33595828).

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

28028924 is a wasteful number, since it uses less digits than its factorization.

28028924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8306 (or 8293 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28028924 is about 5294.2349777848. The cubic root of 28028924 is about 303.7634210850.

The spelling of 28028924 in words is "twenty-eight million, twenty-eight thousand, nine hundred twenty-four".