243855366 has 16 divisors (see below), whose sum is σ = 487912944. Its totient is φ = 81251424.

The previous prime is 243855349. The next prime is 243855371. The reversal of 243855366 is 663558342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10536 + ... + 24468.

It is an arithmetic number, because the mean of its divisors is an integer number (30494559).

Almost surely, 2^243855366 is an apocalyptic number.

243855366 is an abundant number, since it is smaller than the sum of its proper divisors (244057578).

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

243855366 is a wasteful number, since it uses less digits than its factorization.

243855366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16855.

The product of its digits is 518400, while the sum is 42.

The square root of 243855366 is about 15615.8690440206. The cubic root of 243855366 is about 624.7564841190.

It can be divided in two parts, 24385536 and 6, that multiplied together give a square (146313216 = 12096²).

The spelling of 243855366 in words is "two hundred forty-three million, eight hundred fifty-five thousand, three hundred sixty-six".