28764205 has 16 divisors (see below), whose sum is σ = 35513280. Its totient is φ = 22353408.

The previous prime is 28764199. The next prime is 28764223. The reversal of 28764205 is 50246782.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28764205 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75706 + ... + 76084.

It is an arithmetic number, because the mean of its divisors is an integer number (2219580).

Almost surely, 2^28764205 is an apocalyptic number.

It is an amenable number.

28764205 is a deficient number, since it is larger than the sum of its proper divisors (6749075).

28764205 is a wasteful number, since it uses less digits than its factorization.

28764205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 28764205 is about 5363.2271068826. The cubic root of 28764205 is about 306.3967293552.

The spelling of 28764205 in words is "twenty-eight million, seven hundred sixty-four thousand, two hundred five".