285338646 has 32 divisors (see below), whose sum is σ = 635143680. Its totient is φ = 94954248.

The previous prime is 285338629. The next prime is 285338681. The reversal of 285338646 is 646833582.

It is a happy number.

It is a super-2 number, since 2×285338646² = 162836285802226632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 30855 + ... + 39021.

It is an arithmetic number, because the mean of its divisors is an integer number (19848240).

Almost surely, 2^285338646 is an apocalyptic number.

285338646 is an abundant number, since it is smaller than the sum of its proper divisors (349805034).

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

285338646 is a wasteful number, since it uses less digits than its factorization.

285338646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8825 (or 8819 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 285338646 is about 16891.9698673660. The cubic root of 285338646 is about 658.3449855902.

The spelling of 285338646 in words is "two hundred eighty-five million, three hundred thirty-eight thousand, six hundred forty-six".