28328268 has 24 divisors (see below), whose sum is σ = 66783472. Its totient is φ = 9345024.

The previous prime is 28328257. The next prime is 28328281. The reversal of 28328268 is 86282382.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11005 + ... + 13332.

Almost surely, 2^28328268 is an apocalyptic number.

It is an amenable number.

28328268 is an abundant number, since it is smaller than the sum of its proper divisors (38455204).

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

28328268 is a wasteful number, since it uses less digits than its factorization.

28328268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24441 (or 24439 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 28328268 is about 5322.4306477398. The cubic root of 28328268 is about 304.8409741625.

The spelling of 28328268 in words is "twenty-eight million, three hundred twenty-eight thousand, two hundred sixty-eight".