28328776 has 16 divisors (see below), whose sum is σ = 60704640. Its totient is φ = 12140880.

The previous prime is 28328771. The next prime is 28328779. The reversal of 28328776 is 67782382.

It is not an unprimeable number, because it can be changed into a prime (28328771) 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, 252880 + ... + 252991.

It is an arithmetic number, because the mean of its divisors is an integer number (3794040).

Almost surely, 2^28328776 is an apocalyptic number.

It is an amenable number.

28328776 is an abundant number, since it is smaller than the sum of its proper divisors (32375864).

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

28328776 is a wasteful number, since it uses less digits than its factorization.

28328776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505884 (or 505880 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 28328776 is about 5322.4783700829. The cubic root of 28328776 is about 304.8427963504.

The spelling of 28328776 in words is "twenty-eight million, three hundred twenty-eight thousand, seven hundred seventy-six".