285805938 has 32 divisors (see below), whose sum is σ = 660260160. Its totient is φ = 81512960.

The previous prime is 285805937. The next prime is 285805951. The reversal of 285805938 is 839508582.

It is not an unprimeable number, because it can be changed into a prime (285805931) 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, 126243 + ... + 128486.

It is an arithmetic number, because the mean of its divisors is an integer number (20633130).

Almost surely, 2^285805938 is an apocalyptic number.

285805938 is an abundant number, since it is smaller than the sum of its proper divisors (374454222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285805938 is a wasteful number, since it uses less digits than its factorization.

285805938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254762.

The product of its (nonzero) digits is 691200, while the sum is 48.

The square root of 285805938 is about 16905.7959883585. The cubic root of 285805938 is about 658.7041746499.

The spelling of 285805938 in words is "two hundred eighty-five million, eight hundred five thousand, nine hundred thirty-eight".