243040404 has 48 divisors (see below), whose sum is σ = 580390272. Its totient is φ = 79128192.

The previous prime is 243040393. The next prime is 243040439. The reversal of 243040404 is 404040342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166542 + ... + 167994.

It is an arithmetic number, because the mean of its divisors is an integer number (12091464).

Almost surely, 2^243040404 is an apocalyptic number.

It is an amenable number.

243040404 is an abundant number, since it is smaller than the sum of its proper divisors (337349868).

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

243040404 is a wasteful number, since it uses less digits than its factorization.

243040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 243040404 is about 15589.7531731583. The cubic root of 243040404 is about 624.0597308864.

Adding to 243040404 its reverse (404040342), we get a palindrome (647080746).

The spelling of 243040404 in words is "two hundred forty-three million, forty thousand, four hundred four".