243194864 has 40 divisors (see below), whose sum is σ = 520561920. Its totient is φ = 109137600.

The previous prime is 243194837. The next prime is 243194867. The reversal of 243194864 is 468491342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243194867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5159 + ... + 22649.

It is an arithmetic number, because the mean of its divisors is an integer number (13014048).

Almost surely, 2^243194864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243194864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260280960).

243194864 is an abundant number, since it is smaller than the sum of its proper divisors (277367056).

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

243194864 is a wasteful number, since it uses less digits than its factorization.

243194864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17589 (or 17583 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 243194864 is about 15594.7062812994. The cubic root of 243194864 is about 624.1919062388.

The spelling of 243194864 in words is "two hundred forty-three million, one hundred ninety-four thousand, eight hundred sixty-four".