28427786 has 8 divisors (see below), whose sum is σ = 42967584. Its totient is φ = 14105260.

The previous prime is 28427783. The next prime is 28427797. The reversal of 28427786 is 68772482.

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

It is not an unprimeable number, because it can be changed into a prime (28427783) by changing a digit.

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, 53990 + ... + 54513.

It is an arithmetic number, because the mean of its divisors is an integer number (5370948).

Almost surely, 2^28427786 is an apocalyptic number.

28427786 is a deficient number, since it is larger than the sum of its proper divisors (14539798).

28427786 is a wasteful number, since it uses less digits than its factorization.

28427786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108636.

The product of its digits is 301056, while the sum is 44.

The square root of 28427786 is about 5331.7713754436. The cubic root of 28427786 is about 305.1975285900.

The spelling of 28427786 in words is "twenty-eight million, four hundred twenty-seven thousand, seven hundred eighty-six".