285319242 has 24 divisors (see below), whose sum is σ = 665745444. Its totient is φ = 87790464.

The previous prime is 285319241. The next prime is 285319249. The reversal of 285319242 is 242913582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 278923401 + 6395841 = 16701^2 + 2529^2 .

It is a junction number, because it is equal to n+sod(n) for n = 285319197 and 285319206.

It is not an unprimeable number, because it can be changed into a prime (285319241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 609423 + ... + 609890.

Almost surely, 2^285319242 is an apocalyptic number.

285319242 is an abundant number, since it is smaller than the sum of its proper divisors (380426202).

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

285319242 is a wasteful number, since it uses less digits than its factorization.

285319242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219334 (or 1219331 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 285319242 is about 16891.3955018524. The cubic root of 285319242 is about 658.3300620180.

It can be divided in two parts, 28531 and 9242, that added together give a palindrome (37773).

The spelling of 285319242 in words is "two hundred eighty-five million, three hundred nineteen thousand, two hundred forty-two".