285685704 has 80 divisors (see below), whose sum is σ = 819777420. Its totient is φ = 92897280.

The previous prime is 285685667. The next prime is 285685711. The reversal of 285685704 is 407586582.

285685704 is a `hidden beast` number, since 28 + 56 + 8 + 570 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 285677604 + 8100 = 16902^2 + 90^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 285685704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21192 + ... + 31944.

Almost surely, 2^285685704 is an apocalyptic number.

285685704 is a gapful number since it is divisible by the number (24) 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 285685704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409888710).

285685704 is an abundant number, since it is smaller than the sum of its proper divisors (534091716).

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

285685704 is a wasteful number, since it uses less digits than its factorization.

285685704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10812 (or 10799 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 285685704 is about 16902.2396149149. The cubic root of 285685704 is about 658.6117929138.

The spelling of 285685704 in words is "two hundred eighty-five million, six hundred eighty-five thousand, seven hundred four".