285306393 has 16 divisors (see below), whose sum is σ = 404709696. Its totient is φ = 178160640.

The previous prime is 285306377. The next prime is 285306397. The reversal of 285306393 is 393603582.

It is not a de Polignac number, because 285306393 - 2⁴ = 285306377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285306397) 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 15 ways as a sum of consecutive naturals, for example, 2496 + ... + 24017.

It is an arithmetic number, because the mean of its divisors is an integer number (25294356).

Almost surely, 2^285306393 is an apocalyptic number.

It is an amenable number.

285306393 is a deficient number, since it is larger than the sum of its proper divisors (119403303).

285306393 is a wasteful number, since it uses less digits than its factorization.

285306393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26744.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 285306393 is about 16891.0151559934. The cubic root of 285306393 is about 658.3201795089.

The spelling of 285306393 in words is "two hundred eighty-five million, three hundred six thousand, three hundred ninety-three".