243813864 has 64 divisors (see below), whose sum is σ = 737596800. Its totient is φ = 65562624.

The previous prime is 243813859. The next prime is 243813877. The reversal of 243813864 is 468318342.

It is a happy number.

It is a super-2 number, since 2×243813864² = 118890400557220992, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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 15 ways as a sum of consecutive naturals, for example, 39829 + ... + 45540.

It is an arithmetic number, because the mean of its divisors is an integer number (11524950).

Almost surely, 2^243813864 is an apocalyptic number.

243813864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

243813864 is an abundant number, since it is smaller than the sum of its proper divisors (493782936).

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

243813864 is a wasteful number, since it uses less digits than its factorization.

243813864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85402 (or 85398 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 243813864 is about 15614.5401469272. The cubic root of 243813864 is about 624.7210394548.

The spelling of 243813864 in words is "two hundred forty-three million, eight hundred thirteen thousand, eight hundred sixty-four".