285847049 has 4 divisors (see below), whose sum is σ = 289762836. Its totient is φ = 281931264.

The previous prime is 285847033. The next prime is 285847087. The reversal of 285847049 is 940748582.

It is a happy number.

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 161925625 + 123921424 = 12725^2 + 11132^2 .

It is a cyclic number.

It is not a de Polignac number, because 285847049 - 2⁴ = 285847033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 285846994 and 285847012.

It is not an unprimeable number, because it can be changed into a prime (285847099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1957784 + ... + 1957929.

It is an arithmetic number, because the mean of its divisors is an integer number (72440709).

Almost surely, 2^285847049 is an apocalyptic number.

It is an amenable number.

285847049 is a deficient number, since it is larger than the sum of its proper divisors (3915787).

285847049 is an equidigital number, since it uses as much as digits as its factorization.

285847049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915786.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 285847049 is about 16907.0118294156. The cubic root of 285847049 is about 658.7357563229.

The spelling of 285847049 in words is "two hundred eighty-five million, eight hundred forty-seven thousand, forty-nine".