28786286 has 8 divisors (see below), whose sum is σ = 43215120. Its totient is φ = 14381248.

The previous prime is 28786283. The next prime is 28786301. The reversal of 28786286 is 68268782.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28786286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28786283) 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, 2531 + ... + 7998.

It is an arithmetic number, because the mean of its divisors is an integer number (5401890).

Almost surely, 2^28786286 is an apocalyptic number.

28786286 is a deficient number, since it is larger than the sum of its proper divisors (14428834).

28786286 is a wasteful number, since it uses less digits than its factorization.

28786286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11898.

The product of its digits is 516096, while the sum is 47.

The square root of 28786286 is about 5365.2852673460. The cubic root of 28786286 is about 306.4751116793.

The spelling of 28786286 in words is "twenty-eight million, seven hundred eighty-six thousand, two hundred eighty-six".