28563879 has 8 divisors (see below), whose sum is σ = 38117632. Its totient is φ = 19026360.

The previous prime is 28563877. The next prime is 28563917. The reversal of 28563879 is 97836582.

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

It is not a de Polignac number, because 28563879 - 2¹ = 28563877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28563877) 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, 924 + ... + 7614.

It is an arithmetic number, because the mean of its divisors is an integer number (4764704).

Almost surely, 2^28563879 is an apocalyptic number.

28563879 is a deficient number, since it is larger than the sum of its proper divisors (9553753).

28563879 is a wasteful number, since it uses less digits than its factorization.

28563879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8117.

The product of its digits is 725760, while the sum is 48.

The square root of 28563879 is about 5344.5185938492. The cubic root of 28563879 is about 305.6837798712.

The spelling of 28563879 in words is "twenty-eight million, five hundred sixty-three thousand, eight hundred seventy-nine".