285378772 has 12 divisors (see below), whose sum is σ = 570757600. Its totient is φ = 122305176.

The previous prime is 285378757. The next prime is 285378781. The reversal of 285378772 is 277873582.

285378772 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5096022 + ... + 5096077.

Almost surely, 2^285378772 is an apocalyptic number.

It is an amenable number.

285378772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

285378772 is a wasteful number, since it uses less digits than its factorization.

285378772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10192110 (or 10192108 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 49.

The square root of 285378772 is about 16893.1575497300. The cubic root of 285378772 is about 658.3758442594.

The spelling of 285378772 in words is "two hundred eighty-five million, three hundred seventy-eight thousand, seven hundred seventy-two".