243115404 has 96 divisors (see below), whose sum is σ = 673913856. Its totient is φ = 66769920.

The previous prime is 243115387. The next prime is 243115409. The reversal of 243115404 is 404511342.

It is not an unprimeable number, because it can be changed into a prime (243115409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250929 + ... + 251895.

It is an arithmetic number, because the mean of its divisors is an integer number (7019936).

Almost surely, 2^243115404 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 243115404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336956928).

243115404 is an abundant number, since it is smaller than the sum of its proper divisors (430798452).

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

243115404 is a wasteful number, since it uses less digits than its factorization.

243115404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 243115404 is about 15592.1584137668. The cubic root of 243115404 is about 624.1239172870.

Adding to 243115404 its reverse (404511342), we get a palindrome (647626746).

The spelling of 243115404 in words is "two hundred forty-three million, one hundred fifteen thousand, four hundred four".