285921834393 has 16 divisors (see below), whose sum is σ = 413551184256. Its totient is φ = 174667574400.

The previous prime is 285921834353. The next prime is 285921834397. The reversal of 285921834393 is 393438129582.

It is a happy number.

It is not a de Polignac number, because 285921834393 - 2¹⁸ = 285921572249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285921834397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26751333 + ... + 26762018.

It is an arithmetic number, because the mean of its divisors is an integer number (25846949016).

Almost surely, 2^285921834393 is an apocalyptic number.

It is an amenable number.

285921834393 is a deficient number, since it is larger than the sum of its proper divisors (127629349863).

285921834393 is a wasteful number, since it uses less digits than its factorization.

285921834393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53513504.

The product of its digits is 11197440, while the sum is 57.

The spelling of 285921834393 in words is "two hundred eighty-five billion, nine hundred twenty-one million, eight hundred thirty-four thousand, three hundred ninety-three".