28678205 has 8 divisors (see below), whose sum is σ = 35214432. Its totient is φ = 22408848.

The previous prime is 28678159. The next prime is 28678213. The reversal of 28678205 is 50287682.

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

It is not a de Polignac number, because 28678205 - 2⁸ = 28677949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66479 + ... + 66908.

It is an arithmetic number, because the mean of its divisors is an integer number (4401804).

Almost surely, 2^28678205 is an apocalyptic number.

It is an amenable number.

28678205 is a deficient number, since it is larger than the sum of its proper divisors (6536227).

28678205 is a wasteful number, since it uses less digits than its factorization.

28678205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133435.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 28678205 is about 5355.2035442175. The cubic root of 28678205 is about 306.0910667768.

The spelling of 28678205 in words is "twenty-eight million, six hundred seventy-eight thousand, two hundred five".