285905361 has 16 divisors (see below), whose sum is σ = 435916800. Its totient is φ = 163280208.

The previous prime is 285905359. The next prime is 285905429. The reversal of 285905361 is 163509582.

It is not a de Polignac number, because 285905361 - 2¹ = 285905359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285905261) 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, 51520 + ... + 56798.

It is an arithmetic number, because the mean of its divisors is an integer number (27244800).

Almost surely, 2^285905361 is an apocalyptic number.

285905361 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

285905361 is a deficient number, since it is larger than the sum of its proper divisors (150011439).

285905361 is a wasteful number, since it uses less digits than its factorization.

285905361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7868.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 285905361 is about 16908.7362330838. The cubic root of 285905361 is about 658.7805466958.

The spelling of 285905361 in words is "two hundred eighty-five million, nine hundred five thousand, three hundred sixty-one".