285788256 has 192 divisors, whose sum is σ = 853493760. Its totient is φ = 83128320.

The previous prime is 285788249. The next prime is 285788257. The reversal of 285788256 is 652887582.

It is a junction number, because it is equal to n+sod(n) for n = 285788199 and 285788208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285788257) 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, 3211060 + ... + 3211148.

It is an arithmetic number, because the mean of its divisors is an integer number (4445280).

Almost surely, 2^285788256 is an apocalyptic number.

285788256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285788256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426746880).

285788256 is an abundant number, since it is smaller than the sum of its proper divisors (567705504).

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

285788256 is a wasteful number, since it uses less digits than its factorization.

285788256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 221 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 51.

The square root of 285788256 is about 16905.2730235273. The cubic root of 285788256 is about 658.6905903189.

The spelling of 285788256 in words is "two hundred eighty-five million, seven hundred eighty-eight thousand, two hundred fifty-six".