28307086 has 8 divisors (see below), whose sum is σ = 42502824. Its totient is φ = 14139480.

The previous prime is 28307063. The next prime is 28307087. The reversal of 28307086 is 68070382.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28307086² = 1602582235622792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28307087) 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 3 ways as a sum of consecutive naturals, for example, 4305 + ... + 8668.

It is an arithmetic number, because the mean of its divisors is an integer number (5312853).

Almost surely, 2^28307086 is an apocalyptic number.

28307086 is a deficient number, since it is larger than the sum of its proper divisors (14195738).

28307086 is a wasteful number, since it uses less digits than its factorization.

28307086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14066.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28307086 is about 5320.4403953056. The cubic root of 28307086 is about 304.7649752628.

The spelling of 28307086 in words is "twenty-eight million, three hundred seven thousand, eighty-six".