285247256 has 32 divisors (see below), whose sum is σ = 616667040. Its totient is φ = 121164288.

The previous prime is 285247253. The next prime is 285247297. The reversal of 285247256 is 652742582.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285247253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16211 + ... + 28866.

It is an arithmetic number, because the mean of its divisors is an integer number (19270845).

Almost surely, 2^285247256 is an apocalyptic number.

It is an amenable number.

285247256 is an abundant number, since it is smaller than the sum of its proper divisors (331419784).

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

285247256 is a wasteful number, since it uses less digits than its factorization.

285247256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45203 (or 45199 counting only the distinct ones).

The product of its digits is 268800, while the sum is 41.

The square root of 285247256 is about 16889.2645192146. The cubic root of 285247256 is about 658.2746918373.

The spelling of 285247256 in words is "two hundred eighty-five million, two hundred forty-seven thousand, two hundred fifty-six".