285809952 has 48 divisors (see below), whose sum is σ = 752431680. Its totient is φ = 94993152.

The previous prime is 285809929. The next prime is 285809963. The reversal of 285809952 is 259908582.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30318 + ... + 38610.

It is an arithmetic number, because the mean of its divisors is an integer number (15675660).

Almost surely, 2^285809952 is an apocalyptic number.

It is an amenable number.

285809952 is an abundant number, since it is smaller than the sum of its proper divisors (466621728).

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

285809952 is a wasteful number, since it uses less digits than its factorization.

285809952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8665 (or 8657 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 285809952 is about 16905.9147046233. The cubic root of 285809952 is about 658.7072583579.

The spelling of 285809952 in words is "two hundred eighty-five million, eight hundred nine thousand, nine hundred fifty-two".