285789868 has 144 divisors (see below), whose sum is σ = 685090560. Its totient is φ = 101243520.

The previous prime is 285789857. The next prime is 285789871. The reversal of 285789868 is 868987582.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6646255 + ... + 6646297.

Almost surely, 2^285789868 is an apocalyptic number.

285789868 is a gapful number since it is divisible by the number (28) 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 285789868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342545280).

285789868 is an abundant number, since it is smaller than the sum of its proper divisors (399300692).

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

285789868 is a wasteful number, since it uses less digits than its factorization.

285789868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 115 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 61.

The square root of 285789868 is about 16905.3207008918. The cubic root of 285789868 is about 658.6918287733.

The spelling of 285789868 in words is "two hundred eighty-five million, seven hundred eighty-nine thousand, eight hundred sixty-eight".