285494688 has 72 divisors (see below), whose sum is σ = 813679776. Its totient is φ = 94953600.

The previous prime is 285494681. The next prime is 285494723. The reversal of 285494688 is 886494582.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (285494681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180943 + ... + 182513.

It is an arithmetic number, because the mean of its divisors is an integer number (11301108).

Almost surely, 2^285494688 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 285494688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406839888).

285494688 is an abundant number, since it is smaller than the sum of its proper divisors (528185088).

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

285494688 is a wasteful number, since it uses less digits than its factorization.

285494688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218 (or 2207 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 54.

The square root of 285494688 is about 16896.5880579483. The cubic root of 285494688 is about 658.4649725472.

The spelling of 285494688 in words is "two hundred eighty-five million, four hundred ninety-four thousand, six hundred eighty-eight".