285319056 has 40 divisors (see below), whose sum is σ = 804082464. Its totient is φ = 86460160.

The previous prime is 285319051. The next prime is 285319079. The reversal of 285319056 is 650913582.

It is a super-2 number, since 2×285319056² = 162813927433462272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (285319051) 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, 269661 + ... + 270716.

Almost surely, 2^285319056 is an apocalyptic number.

It is an amenable number.

285319056 is an abundant number, since it is smaller than the sum of its proper divisors (518763408).

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

285319056 is a wasteful number, since it uses less digits than its factorization.

285319056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540399 (or 540393 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 285319056 is about 16891.3899960897. The cubic root of 285319056 is about 658.3299189625.

The spelling of 285319056 in words is "two hundred eighty-five million, three hundred nineteen thousand, fifty-six".