28065330 has 48 divisors (see below), whose sum is σ = 75493080. Its totient is φ = 7225344.

The previous prime is 28065293. The next prime is 28065343. The reversal of 28065330 is 3356082.

28065330 is a `hidden beast` number, since 2 + 8 + 0 + 653 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 27217089 + 848241 = 5217^2 + 921^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28065294 and 28065303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2767 + ... + 7986.

Almost surely, 2^28065330 is an apocalyptic number.

28065330 is an abundant number, since it is smaller than the sum of its proper divisors (47427750).

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

28065330 is a wasteful number, since it uses less digits than its factorization.

28065330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10795 (or 10792 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 28065330 is about 5297.6721302852. The cubic root of 28065330 is about 303.8948808414.

The spelling of 28065330 in words is "twenty-eight million, sixty-five thousand, three hundred thirty".