28569853 has 4 divisors (see below), whose sum is σ = 30767548. Its totient is φ = 26372160.

The previous prime is 28569851. The next prime is 28569857. The reversal of 28569853 is 35896582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14417209 + 14152644 = 3797^2 + 3762^2 .

It is a cyclic number.

It is not a de Polignac number, because 28569853 - 2¹ = 28569851 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 (28569851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098828 + ... + 1098853.

It is an arithmetic number, because the mean of its divisors is an integer number (7691887).

Almost surely, 2^28569853 is an apocalyptic number.

It is an amenable number.

28569853 is a deficient number, since it is larger than the sum of its proper divisors (2197695).

28569853 is a wasteful number, since it uses less digits than its factorization.

28569853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197694.

The product of its digits is 518400, while the sum is 46.

The square root of 28569853 is about 5345.0774550047. The cubic root of 28569853 is about 305.7050891572.

The spelling of 28569853 in words is "twenty-eight million, five hundred sixty-nine thousand, eight hundred fifty-three".