285485256 has 128 divisors (see below), whose sum is σ = 927590400. Its totient is φ = 79652160.

The previous prime is 285485237. The next prime is 285485257. The reversal of 285485256 is 652584582.

It is a happy number.

285485256 is a `hidden beast` number, since 2 + 8 + 548 + 52 + 56 = 666.

It is not an unprimeable number, because it can be changed into a prime (285485257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62821 + ... + 67211.

It is an arithmetic number, because the mean of its divisors is an integer number (7246800).

Almost surely, 2^285485256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285485256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463795200).

285485256 is an abundant number, since it is smaller than the sum of its proper divisors (642105144).

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

285485256 is a wasteful number, since it uses less digits than its factorization.

285485256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456 (or 4446 counting only the distinct ones).

The product of its digits is 768000, while the sum is 45.

The square root of 285485256 is about 16896.3089460391. The cubic root of 285485256 is about 658.4577211454.

The spelling of 285485256 in words is "two hundred eighty-five million, four hundred eighty-five thousand, two hundred fifty-six".