285689946 has 16 divisors (see below), whose sum is σ = 596222784. Its totient is φ = 91089504.

The previous prime is 285689941. The next prime is 285689959. The reversal of 285689946 is 649986582.

It is not an unprimeable number, because it can be changed into a prime (285689941) 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 7 ways as a sum of consecutive naturals, for example, 1034971 + ... + 1035246.

It is an arithmetic number, because the mean of its divisors is an integer number (37263924).

Almost surely, 2^285689946 is an apocalyptic number.

285689946 is an abundant number, since it is smaller than the sum of its proper divisors (310532838).

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

285689946 is a wasteful number, since it uses less digits than its factorization.

285689946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070245.

The product of its digits is 7464960, while the sum is 57.

The square root of 285689946 is about 16902.3651007781. The cubic root of 285689946 is about 658.6150526936.

The spelling of 285689946 in words is "two hundred eighty-five million, six hundred eighty-nine thousand, nine hundred forty-six".