28558165 has 8 divisors (see below), whose sum is σ = 34300728. Its totient is φ = 22825920.

The previous prime is 28558163. The next prime is 28558171. The reversal of 28558165 is 56185582.

It can be written as a sum of positive squares in 4 ways, for example, as 3247204 + 25310961 = 1802^2 + 5031^2 .

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

It is not a de Polignac number, because 28558165 - 2¹ = 28558163 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 (28558163) 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, 6295 + ... + 9835.

It is an arithmetic number, because the mean of its divisors is an integer number (4287591).

Almost surely, 2^28558165 is an apocalyptic number.

It is an amenable number.

28558165 is a deficient number, since it is larger than the sum of its proper divisors (5742563).

28558165 is a wasteful number, since it uses less digits than its factorization.

28558165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5159.

The product of its digits is 96000, while the sum is 40.

The square root of 28558165 is about 5343.9840007246. The cubic root of 28558165 is about 305.6633952262.

The spelling of 28558165 in words is "twenty-eight million, five hundred fifty-eight thousand, one hundred sixty-five".