285305166 has 40 divisors (see below), whose sum is σ = 641769480. Its totient is φ = 94733712.

The previous prime is 285305149. The next prime is 285305171. The reversal of 285305166 is 661503582.

It is a self number, because there is not a number n which added to its sum of digits gives 285305166.

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 19 ways as a sum of consecutive naturals, for example, 40305 + ... + 46851.

It is an arithmetic number, because the mean of its divisors is an integer number (16044237).

Almost surely, 2^285305166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285305166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320884740).

285305166 is an abundant number, since it is smaller than the sum of its proper divisors (356464314).

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

285305166 is a wasteful number, since it uses less digits than its factorization.

285305166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6830 (or 6821 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 285305166 is about 16890.9788348692. The cubic root of 285305166 is about 658.3192357750.

The spelling of 285305166 in words is "two hundred eighty-five million, three hundred five thousand, one hundred sixty-six".