28786627 has 4 divisors (see below), whose sum is σ = 30479976. Its totient is φ = 27093280.

The previous prime is 28786621. The next prime is 28786643. The reversal of 28786627 is 72668782.

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

It is a cyclic number.

It is not a de Polignac number, because 28786627 - 2¹¹ = 28784579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28786621) 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, 846649 + ... + 846682.

It is an arithmetic number, because the mean of its divisors is an integer number (7619994).

Almost surely, 2^28786627 is an apocalyptic number.

28786627 is a deficient number, since it is larger than the sum of its proper divisors (1693349).

28786627 is a wasteful number, since it uses less digits than its factorization.

28786627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693348.

The product of its digits is 451584, while the sum is 46.

The square root of 28786627 is about 5365.3170456181. The cubic root of 28786627 is about 306.4763218342.

The spelling of 28786627 in words is "twenty-eight million, seven hundred eighty-six thousand, six hundred twenty-seven".