285730946 has 16 divisors (see below), whose sum is σ = 441323640. Its totient is φ = 138643200.

The previous prime is 285730933. The next prime is 285730957. The reversal of 285730946 is 649037582.

It can be written as a sum of positive squares in 4 ways, for example, as 215355625 + 70375321 = 14675^2 + 8389^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 285730897 and 285730906.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24860 + ... + 34488.

Almost surely, 2^285730946 is an apocalyptic number.

285730946 is a deficient number, since it is larger than the sum of its proper divisors (155592694).

285730946 is a wasteful number, since it uses less digits than its factorization.

285730946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10069.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 285730946 is about 16903.5779052838. The cubic root of 285730946 is about 658.6465576238.

The spelling of 285730946 in words is "two hundred eighty-five million, seven hundred thirty thousand, nine hundred forty-six".