28686849 has 8 divisors (see below), whose sum is σ = 38305920. Its totient is φ = 19096176.

The previous prime is 28686817. The next prime is 28686857. The reversal of 28686849 is 94868682.

It is a happy number.

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

It is not a de Polignac number, because 28686849 - 2⁵ = 28686817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28686809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4617 + ... + 8870.

It is an arithmetic number, because the mean of its divisors is an integer number (4788240).

Almost surely, 2^28686849 is an apocalyptic number.

It is an amenable number.

28686849 is a deficient number, since it is larger than the sum of its proper divisors (9619071).

28686849 is a wasteful number, since it uses less digits than its factorization.

28686849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14199.

The product of its digits is 1327104, while the sum is 51.

The square root of 28686849 is about 5356.0105489067. The cubic root of 28686849 is about 306.1218170206.

The spelling of 28686849 in words is "twenty-eight million, six hundred eighty-six thousand, eight hundred forty-nine".