28205159 has 8 divisors (see below), whose sum is σ = 30161808. Its totient is φ = 26281600.

The previous prime is 28205147. The next prime is 28205173. The reversal of 28205159 is 95150282.

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

It is a cyclic number.

It is not a de Polignac number, because 28205159 - 2⁸ = 28204903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28205179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6497 + ... + 9930.

It is an arithmetic number, because the mean of its divisors is an integer number (3770226).

Almost surely, 2^28205159 is an apocalyptic number.

28205159 is a deficient number, since it is larger than the sum of its proper divisors (1956649).

28205159 is a wasteful number, since it uses less digits than its factorization.

28205159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16545.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 28205159 is about 5310.8529446785. The cubic root of 28205159 is about 304.3987402408.

The spelling of 28205159 in words is "twenty-eight million, two hundred five thousand, one hundred fifty-nine".