285209052 has 48 divisors (see below), whose sum is σ = 693848064. Its totient is φ = 91080000.

The previous prime is 285208991. The next prime is 285209053. The reversal of 285209052 is 250902582.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285209053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33777 + ... + 41367.

It is an arithmetic number, because the mean of its divisors is an integer number (14455168).

Almost surely, 2^285209052 is an apocalyptic number.

It is an amenable number.

285209052 is an abundant number, since it is smaller than the sum of its proper divisors (408639012).

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

285209052 is a wasteful number, since it uses less digits than its factorization.

285209052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7730 (or 7728 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 285209052 is about 16888.1334670235. The cubic root of 285209052 is about 658.2453023064.

The spelling of 285209052 in words is "two hundred eighty-five million, two hundred nine thousand, fifty-two".