28068278 has 12 divisors (see below), whose sum is σ = 48976452. Its totient is φ = 12029220.

The previous prime is 28068277. The next prime is 28068307. The reversal of 28068278 is 87286082.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28068277) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 143108 + ... + 143303.

It is an arithmetic number, because the mean of its divisors is an integer number (4081371).

Almost surely, 2^28068278 is an apocalyptic number.

28068278 is a deficient number, since it is larger than the sum of its proper divisors (20908174).

28068278 is a wasteful number, since it uses less digits than its factorization.

28068278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286427 (or 286420 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 28068278 is about 5297.9503583933. The cubic root of 28068278 is about 303.9055209057.

The spelling of 28068278 in words is "twenty-eight million, sixty-eight thousand, two hundred seventy-eight".