285189161 has 8 divisors (see below), whose sum is σ = 312378120. Its totient is φ = 259157248.

The previous prime is 285189109. The next prime is 285189169. The reversal of 285189161 is 161981582.

It can be written as a sum of positive squares in 4 ways, for example, as 14784025 + 270405136 = 3845^2 + 16444^2 .

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

It is not a de Polignac number, because 285189161 - 2⁶ = 285189097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285189169) 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, 288746 + ... + 289731.

It is an arithmetic number, because the mean of its divisors is an integer number (39047265).

Almost surely, 2^285189161 is an apocalyptic number.

It is an amenable number.

285189161 is a deficient number, since it is larger than the sum of its proper divisors (27188959).

285189161 is a wasteful number, since it uses less digits than its factorization.

285189161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578523.

The product of its digits is 34560, while the sum is 41.

The square root of 285189161 is about 16887.5445521248. The cubic root of 285189161 is about 658.2299995409.

The spelling of 285189161 in words is "two hundred eighty-five million, one hundred eighty-nine thousand, one hundred sixty-one".