285563216 has 20 divisors (see below), whose sum is σ = 577335072. Its totient is φ = 136573536.

The previous prime is 285563189. The next prime is 285563231. The reversal of 285563216 is 612365582.

It is a self number, because there is not a number n which added to its sum of digits gives 285563216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387626 + ... + 388361.

Almost surely, 2^285563216 is an apocalyptic number.

It is an amenable number.

285563216 is an abundant number, since it is smaller than the sum of its proper divisors (291771856).

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

285563216 is a wasteful number, since it uses less digits than its factorization.

285563216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776018 (or 776012 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 285563216 is about 16898.6158013016. The cubic root of 285563216 is about 658.5176526607.

The spelling of 285563216 in words is "two hundred eighty-five million, five hundred sixty-three thousand, two hundred sixteen".