285968090 has 16 divisors (see below), whose sum is σ = 516276072. Its totient is φ = 114046464.

The previous prime is 285968063. The next prime is 285968113. The reversal of 285968090 is 90869582.

It can be written as a sum of positive squares in 4 ways, for example, as 170641969 + 115326121 = 13063^2 + 10739^2 .

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 39059 + ... + 45798.

Almost surely, 2^285968090 is an apocalyptic number.

285968090 is a deficient number, since it is larger than the sum of its proper divisors (230307982).

285968090 is a wasteful number, since it uses less digits than its factorization.

285968090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85201.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 285968090 is about 16910.5910600428. The cubic root of 285968090 is about 658.8287230374.

The spelling of 285968090 in words is "two hundred eighty-five million, nine hundred sixty-eight thousand, ninety".