285982216 has 64 divisors (see below), whose sum is σ = 604558080. Its totient is φ = 125944320.

The previous prime is 285982111. The next prime is 285982237. The reversal of 285982216 is 612289582.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199695 + ... + 201121.

It is an arithmetic number, because the mean of its divisors is an integer number (9446220).

Almost surely, 2^285982216 is an apocalyptic number.

285982216 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 285982216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302279040).

285982216 is an abundant number, since it is smaller than the sum of its proper divisors (318575864).

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

285982216 is a wasteful number, since it uses less digits than its factorization.

285982216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534 (or 1530 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 285982216 is about 16911.0087221313. The cubic root of 285982216 is about 658.8395709392.

The spelling of 285982216 in words is "two hundred eighty-five million, nine hundred eighty-two thousand, two hundred sixteen".