28086612 has 12 divisors (see below), whose sum is σ = 65535456. Its totient is φ = 9362200.

The previous prime is 28086607. The next prime is 28086631. The reversal of 28086612 is 21668082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1170264 + ... + 1170287.

It is an arithmetic number, because the mean of its divisors is an integer number (5461288).

Almost surely, 2^28086612 is an apocalyptic number.

It is an amenable number.

28086612 is an abundant number, since it is smaller than the sum of its proper divisors (37448844).

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

28086612 is a wasteful number, since it uses less digits than its factorization.

28086612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340558 (or 2340556 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28086612 is about 5299.6803677203. The cubic root of 28086612 is about 303.9716761469.

The spelling of 28086612 in words is "twenty-eight million, eighty-six thousand, six hundred twelve".