28564745 has 8 divisors (see below), whose sum is σ = 37393920. Its totient is φ = 20774320.

The previous prime is 28564729. The next prime is 28564751. The reversal of 28564745 is 54746582.

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

It is not a de Polignac number, because 28564745 - 2⁴ = 28564729 is a prime.

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, 259625 + ... + 259734.

It is an arithmetic number, because the mean of its divisors is an integer number (4674240).

Almost surely, 2^28564745 is an apocalyptic number.

It is an amenable number.

28564745 is a deficient number, since it is larger than the sum of its proper divisors (8829175).

28564745 is a wasteful number, since it uses less digits than its factorization.

28564745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519375.

The product of its digits is 268800, while the sum is 41.

The square root of 28564745 is about 5344.5996108221. The cubic root of 28564745 is about 305.6868690814.

The spelling of 28564745 in words is "twenty-eight million, five hundred sixty-four thousand, seven hundred forty-five".