243395394 has 64 divisors (see below), whose sum is σ = 548190720. Its totient is φ = 71406720.

The previous prime is 243395381. The next prime is 243395401. The reversal of 243395394 is 493593342.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 394174 + ... + 394790.

It is an arithmetic number, because the mean of its divisors is an integer number (8565480).

Almost surely, 2^243395394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243395394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274095360).

243395394 is an abundant number, since it is smaller than the sum of its proper divisors (304795326).

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

243395394 is a wasteful number, since it uses less digits than its factorization.

243395394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815.

The product of its digits is 349920, while the sum is 42.

The square root of 243395394 is about 15601.1343818326. The cubic root of 243395394 is about 624.3634213951.

The spelling of 243395394 in words is "two hundred forty-three million, three hundred ninety-five thousand, three hundred ninety-four".