28343185 has 16 divisors (see below), whose sum is σ = 36786960. Its totient is φ = 20839680.

The previous prime is 28343167. The next prime is 28343191. The reversal of 28343185 is 58134382.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4048144 + 24295041 = 2012^2 + 4929^2 .

It is not a de Polignac number, because 28343185 - 2⁷ = 28343057 is a prime.

It is a super-2 number, since 2×28343185² = 1606672271888450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28343185.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16675 + ... + 18295.

It is an arithmetic number, because the mean of its divisors is an integer number (2299185).

Almost surely, 2^28343185 is an apocalyptic number.

It is an amenable number.

28343185 is a deficient number, since it is larger than the sum of its proper divisors (8443775).

28343185 is a wasteful number, since it uses less digits than its factorization.

28343185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908.

The product of its digits is 23040, while the sum is 34.

The square root of 28343185 is about 5323.8317967419. The cubic root of 28343185 is about 304.8944721369.

The spelling of 28343185 in words is "twenty-eight million, three hundred forty-three thousand, one hundred eighty-five".