28069886 has 12 divisors (see below), whose sum is σ = 45593352. Its totient is φ = 12955176.

The previous prime is 28069837. The next prime is 28069889. The reversal of 28069886 is 68896082.

It is a self number, because there is not a number n which added to its sum of digits gives 28069886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28069889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41186 + ... + 41861.

It is an arithmetic number, because the mean of its divisors is an integer number (3799446).

Almost surely, 2^28069886 is an apocalyptic number.

28069886 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28069886 is a deficient number, since it is larger than the sum of its proper divisors (17523466).

28069886 is a wasteful number, since it uses less digits than its factorization.

28069886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83075 (or 83062 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 28069886 is about 5298.1021130212. The cubic root of 28069886 is about 303.9113242631.

The spelling of 28069886 in words is "twenty-eight million, sixty-nine thousand, eight hundred eighty-six".