28068886 has 4 divisors (see below), whose sum is σ = 42103332. Its totient is φ = 14034442.

The previous prime is 28068881. The next prime is 28068889. The reversal of 28068886 is 68886082.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28068886² = 1575724722561992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28068881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7017220 + ... + 7017223.

It is an arithmetic number, because the mean of its divisors is an integer number (10525833).

Almost surely, 2^28068886 is an apocalyptic number.

28068886 is a deficient number, since it is larger than the sum of its proper divisors (14034446).

28068886 is a wasteful number, since it uses less digits than its factorization.

28068886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14034445.

The product of its (nonzero) digits is 294912, while the sum is 46.

The square root of 28068886 is about 5298.0077387637. The cubic root of 28068886 is about 303.9077152360.

The spelling of 28068886 in words is "twenty-eight million, sixty-eight thousand, eight hundred eighty-six".