285868512 has 144 divisors (see below), whose sum is σ = 845273520. Its totient is φ = 91570176.

The previous prime is 285868493. The next prime is 285868543. The reversal of 285868512 is 215868582.

285868512 is a `hidden beast` number, since 28 + 58 + 68 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1481088 + ... + 1481280.

It is an arithmetic number, because the mean of its divisors is an integer number (5869955).

Almost surely, 2^285868512 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 285868512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422636760).

285868512 is an abundant number, since it is smaller than the sum of its proper divisors (559405008).

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

285868512 is a wasteful number, since it uses less digits than its factorization.

285868512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 374 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 285868512 is about 16907.6465541482. The cubic root of 285868512 is about 658.7522431023.

The spelling of 285868512 in words is "two hundred eighty-five million, eight hundred sixty-eight thousand, five hundred twelve".