285866396717056 has 117 divisors (see below), whose sum is σ = 580469848229691. Its totient is φ = 140764158222336.

The previous prime is 285866396717029. The next prime is 285866396717059. The reversal of 285866396717056 is 650717693668582.

The square root of 285866396717056 is 16907584.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285866396717059) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 72499718221 + ... + 72499722163.

Almost surely, 2^{285866396717056} is an apocalyptic number.

285866396717056 is the 16907584-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285866396717056

285866396717056 is an abundant number, since it is smaller than the sum of its proper divisors (294603451512635).

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

285866396717056 is an frugal number, since it uses more digits than its factorization.

285866396717056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8044 (or 4012 counting only the distinct ones).

The product of its (nonzero) digits is 5486745600, while the sum is 79.

The spelling of 285866396717056 in words is "two hundred eighty-five trillion, eight hundred sixty-six billion, three hundred ninety-six million, seven hundred seventeen thousand, fifty-six".