243986085 has 48 divisors (see below), whose sum is σ = 494592384. Its totient is φ = 108936576.

The previous prime is 243986021. The next prime is 243986111. The reversal of 243986085 is 580689342.

243986085 is a `hidden beast` number, since 2 + 4 + 39 + 8 + 608 + 5 = 666.

It is not a de Polignac number, because 243986085 - 2⁶ = 243986021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 243986085.

It is a congruent number.

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, 4539 + ... + 22551.

It is an arithmetic number, because the mean of its divisors is an integer number (10304008).

Almost surely, 2^243986085 is an apocalyptic number.

It is an amenable number.

243986085 is an abundant number, since it is smaller than the sum of its proper divisors (250606299).

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

243986085 is a wasteful number, since it uses less digits than its factorization.

243986085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18074 (or 18071 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 243986085 is about 15620.0539371668. The cubic root of 243986085 is about 624.8680980316.

The spelling of 243986085 in words is "two hundred forty-three million, nine hundred eighty-six thousand, eighty-five".