28029928 has 16 divisors (see below), whose sum is σ = 52627680. Its totient is φ = 13995888.

The previous prime is 28029917. The next prime is 28029929. The reversal of 28029928 is 82992082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28029929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5325 + ... + 9187.

It is an arithmetic number, because the mean of its divisors is an integer number (3289230).

Almost surely, 2^28029928 is an apocalyptic number.

It is an amenable number.

28029928 is a deficient number, since it is larger than the sum of its proper divisors (24597752).

28029928 is a wasteful number, since it uses less digits than its factorization.

28029928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776 (or 4772 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28029928 is about 5294.3297970565. The cubic root of 28029928 is about 303.7670479912.

The spelling of 28029928 in words is "twenty-eight million, twenty-nine thousand, nine hundred twenty-eight".